DNA Matches: What You Can Do with All Your Genetic 4th Cousins

(Update 2020) When genealogists take an ancestry DNA test, they are looking for more than just their ethnicity results. They are also very interested in receiving information on other people who have tested who closely genetically match them. They want to know who the closest matches are, and if those matches have family tree information that they can share. 

However, with all the people testing these days, (some being genealogists and some not) the volume of matches can become overwhelming very quickly. 

Are you one of those people who have way too many genetic “4th cousins or closer” among your DNA matches? Have you ever wondered “What do I do with all these matches?!” If so, keep reading. We’re going to explore some of your options, and most importantly, how to determine how genetically close your cousins really are. 

what to do with your 4th cousins DNA genetic genealogy

Doing the DNA Math on Your Cousins

Math can provide us with a degree of certainty in genetic genealogy. Each of us has two biological parents. We have four biological grandparents, and eight great-grandparents.
too many 4th cousins DNA matches

However, the farther back we go the less we can rely on math.

For example, on paper you should have sixty-four 3rd great grandparents. However, many of us find that the same person occupies more than one slot on our pedigree chart. While this significantly decreases the workload for traditional genealogy, it adversely impacts your genetic genealogy. Especially when it comes to that long long list of 4th cousins you have in your match list at any of the three major DNA testing companies.

Depending on how intermarried your lines are, you may be seeing individuals on your match list that genetically look like your fourth cousins, but they are genealogically your sixth cousins – EIGHT TIMES!  So how can you tell the difference?

There are two parts to that answer: one you can control, and the other you can’t.

Distinguishing DNA Matches with Genetic Tools

While your fourth cousins and your eight-time-sixth cousins may look similar genetically, there are often small clues in the genetics that can help you tell the difference. This distinction can sometimes be detected by a testing company who, through research and validation, has been able to fine-tune their algorithms to detect these subtle differences.

DNA cousins

Your Genetic 4th Cousins

You can participate in this double checking process by using some of the genetic tools that are available to you at Family Tree DNA, or at Gedmatch.com. But since you may not be an aspiring geneticist, let’s focus on the genealogical work you can do to determine if a match is truly a fourth cousin.

Use Google Earth to Plot Your DNA Matches

A fourth cousin designation just means that you and your match are separated by between six and twelve degrees (people). So that might be five back on your chart to your common ancestor, and five down to your match, which would make you true fourth cousins. It could also be some other permutation of that.

For our example, let’s assume true fourth cousins. That means that the two of you share one of thirty-two 3rd great grandparents (16 couples). In order to find out which set, you have two genealogical identifiers: surname and location.

Therefore, the first thing you should do is make a list of the surnames and locations of those thirty-two 3X great grandparents.

Now, most of us do not know all 16 of those couples, so you are going to have some holes. Feel free to fill in those holes with surnames on subsequent generations that will carry through to this fifth generation.

A great tool to plot your own list of ancestors geographically is the free downloadable Google Earth software

Check to see if you have the latest version of Google Earth downloaded to your desktop or laptop computer. On your desktop, look for a grey and white globe. If you see a blue and white globe, you have the older original free version of Google Earth. However, a few years ago, Google made their Google Earth Pro version free to everyone, and it is now the standard. 

If you do have Google Earth Pro (the grey globe software) then you’re ready to go.

Google Earth on your computer desktop


The grey Google Earth globe on the desktop.

If you don’t have it, then you will need to download it. 

How to Download the Free Google Earth Software:

  1. Go to http://www.google.com/earth/download/gep/agree.html
  2. Click the blue download button
  3. Read the Terms and Conditions
  4. If you agree to them, click the Agree and Download button
  5. Follow the installation guide
  6. When complete click Run Google Earth

Now that you have Google Earth, you can begin by creating a folder in the Places panel in Google Earth devoted to your 16 couples. Here’s how:

1. In the Places panel, right-click on MyPlaces and select Add > Folder:

how to create a folder in Google Earth Layers panel for DNA

Right-click on MyPlaces > Add > Folder

2. Name the folder and then click OK:

Creating a folder in Google Earth

Creating a folder in Google Earth

3. Now you will see your new DNA folder for your 16 couples in the Places panel. If you don’t see it, look toward the bottom of the list. You can move the folder to any location within the list by dragging and dropping it. 

Create a folder in Google Earth for DNA 32 couples

Create a folder in Google Earth for DNA 16 couples

Once you have your DNA folder created fro your 16 couples, you can then easily plot your surnames and locations. 

How to Plot Your Surnames and Locations in Google Earth:

1. Click your new DNA folder to select it. This will ensure that the placemark you are about to create will be stored in that folder. 

2. In the search box (upper left corner of the Google Earth software) type in the first location and click Search. Google Earth will fly to that location on the map.

Type the locaton in the Search box and click Search.

Type the locaton in the Search box and click Search.

3. In the toolbar along the top of the screen, click the placemark button to place a pushpin in that location:

Click the Placemark button in the Google Earth toolbar

Click the Placemark button in the Google Earth toolbar.

4. In the Placemark dialogue box, enter a title for hte pushpin placemark. Click the OK button to close the box and set your placemark.

5. Repeat the process for all the locations. 

Then evaluate the fifth generation of your fourth cousin matches for genealogical information that lines up with any of the items on your list.

You can also plot the surnames and locations of your matches in Google Earth. This is where Google Earth really comes in handy. The free software makes it very easy to see when your ancestral home may be bordering the locations of your matches. Those with whom you find a similarity become your best matches, and your best chance of determining your connection. Those without an obvious connection cycle to the bottom of your pile for a genetic evaluation. You can perform these same kinds of searches for your second and third cousins as well.

As you begin to become more familiar with the fifth generations of your matches, you may also start to see patterns of surnames or locations emerge among your matches. These then become the surnames and locations that might be able to fill the missing spaces in your pedigree chart.

More Genetic Genealogy and Google Earth Gems

If you are new to using Google Earth, I have several suggested resources for you by Lisa Louise Cooke:

Premium podcast 131

Learn more in Premium episode 131.

Here’s a video of the authors discussing three common DNA misconceptions:

 

 

Authors: Diahan Southard and Lisa Louise Cooke

What you need to know about Google Earth Pro

Google earth Pro for genealogy keyOn January 28, 2015 Google announced that Google Earth PRO is now available for FREE! Not just a free trial. Google is allowing everyone to get a free key to Google Earth Pro!

In the past the software fee was hundreds of dollars. But now you can get Google Earth Pro for free and gain the ability to do things like “measure 3D buildings, print high-resolution images for presentations or reports, and record HD movies” inside Google Earth.To get your free key to Google Earth Pro sign up here. After submitting the form, you will be emailed the free license key. Copy the license key from the email, then click the link provided to download Google Earth Pro app for PC and Mac.

 

Everything I’ve taught you about using Google Earth still applies, but now you have more tools than ever!

 

Since I announced this in the last Genealogy Gems Newsletter, I’ve received several questions. Here’s what you need to know about Google Earth Pro:

 

From Sheri: “I did get it to finally work…..instead of my phone number running together….I added the dashes between the numbers and then it went through.  FYI….in case you hear an issue from others.”

 

Thanks for the tip Sheri. Most likely the problem you were running into after the big announcement that Google Earth Pro went free was the sheer amount of traffic the site received. Googlers swarmed the site, and any people found it took several attempts to get a successful download. As time passes, it should get quicker and easier to download.

 

From Kathy: “I downloaded the Google Earth Pro BUT now I have regular and Pro on my computer and all the spots marked in regular seemed to have transferred to Pro—Question—should I now uninstall the regular version?”

 

Answer: That decision is really up to you. I’ve decided to keep both for a while, but only do work from this point forward in Pro. If in a few months everything is still running smoothly, then I will probably delete the old free version just to free up disk space on my computer. For now, it certainly doesn’t hurt to leave  it there.

 

The good news is that both programs appear to pull from the same files on your computer. This means that when you create a file in Pro, you will also see it in your Places panel in the free version.

 

Question from Dea: “I downloaded Google Earth Pro on my main computer.  I now want to use the same license key for my laptop and android, as I signed up for 2 to 5 users.  I assumed that I could use the same license key.  When I tried to sign up on my laptop it said I already was a user, but do not know how I can access it from my laptop. Help!”

 

Answer: Although the sign up page asks how many users will be using the program, my understanding is that each download key is for one device. I would guess that the user question is about how many people might be using the application on that device. (Unfortunately the website isn’t clear on this point.) I’m basing this on the fact that when it was a paid version, you had to purchase a license key for each device.

 

As with the original free version of Google Earth, each device you download Google Earth to has it’s own unique Places Panel. In other words, files you create on your desktop computer don’t show up on your laptop. This is because the files are stored on that particular device and not on the Cloud (for privacy reasons).

 

So the bottom line is that to get another license key for another device you will need to use a different email. If you only have one email address, you could create a second free email in Gmail just to have an email you can use.

 

Dea’s Reply: “Thank you for such a prompt reply.  I am sure there must be more than one of you.  I do not know how you get so much accomplished….saw you at Midwest Roots in Indianapolis and, again, at a webinar for our Genealogy Society in Terre Haute, IN.  You are an excellent speaker, teacher as well as entertaining.”

Lisa: Now I’m blushing!!

 

Answers to more questions:

Do you really need Google Earth Pro? Probably not, because Pro was created originally for businesses. However there are some pretty cool extras that you get by going Pro:

  • Movie-Maker: Export Windows Media and QuickTime HD movies, up to 1,920×1,080-pixel resolution. (Sweet!)
  • High-resolution printing: Print images up to 4,800 x 3,200 pixel resolution. (The free version max: 1,000 pixels.)
  • Spreadsheet import: Ingest up to 2,500 addresses at a time, assigning place marks and style templates in bulk. (My geeky side is getting giddy!)
  • Exclusive pro data layers: Demographics, parcels, and traffic count.
  • Advanced measurements: Measure parking lots and land developments with polygon area measure, or determine affected radius with circle measure.

Resources:genealogy television and video

Want to learn more about using Google Earth specifically for genealogy? Check out this free video class.

Google Earth for Genealogy and Toolbox bundleAnd there are several chapters on using Google Earth for genealogy in my brand new book The Genealogist’s Google Toolbox Second Edition (2015). You can pick up as a special bundle here with my 2 disc DVD set Google Earth for Genealogy.

Can You Believe Google Earth is 10 Years Old?? Are You Using Google Earth for Genealogy Yet?

Google Earth 10 years old invitationTen years ago in June, Google Earth was born. The world put it right to work. Within months, recalls a Google Earth employee, “Hurricane Katrina showed us how useful mapping tools like Earth could be for crisis response efforts. Rescue workers compared before and after Satellite imagery in Google Earth to better locate where people were stranded.”

“In the years after,” the blog post continues, “with more than 2 billion downloads by people in nearly every country in the world, Earth has enabled people to discover new coral reefs, journey to the Moon and into deep space, find long-lost parents, clear landmines and much more.”

What about YOU? How have you harnessed the power of Google Earth for good?

What about using Google Earth for genealogy?

Google Earth for Genealogy classIn honor of Google Earth’s birthday, we invite you to watch a free video recording of a special presentation of Google Earth for Genealogy! Check out these blog posts, too:

Google Earth for Genealogy and Toolbox bundleReady to take Google Earth to the next level? Pick up your copies of the video CD series Google Earth for Genealogy at the Genealogy Gems Store.

7 Free Google Search Features Every Genealogist Should Use: Google for Genealogy

Google is a many-faceted gem when it comes to searching for ancestors online. Are you getting the most out of what Google offers?

Google searching–entering your ancestors’ names and other keywords into the main Google search box–is where you start using Google for genealogy. But the search box isn’t the only Google feature that can help you find hidden genealogy treasures online. Here are 7 important Google resources you need:

Google Alerts

Google will sweep the internet for your favorite keyword searches on a regular basis! Just set up as many of these searches as you need with Google Alerts. It’s free and you can customize it to search when and what you want. Click here to learn to set up Google Alerts for genealogy.

Google Books

You may already know that Google Books will keyword search within billions of pages of text in published books from around the world. Some of these books are even available to read in full on the site. Searching Google Books can lead you to facts, stories, new sources for your research and even images. For example, click here to read a post about finding old maps in Google Books.

Google Cache

Web content changes all the time. Sometimes the text, pictures or other content we most want just disappears. A page is revised, or a webpage or an entire website is taken offline. Use Google Cache to look at webpages that no longer exist! Click here to learn more.

Google Earth

I teach people all over the world how to use Google Earth in their genealogy research! Google Earth is the ultimate online map of the world: free, interactive, three-dimensional, multi-layered and crowd-sourced with all kinds of extra content. You can use it to identify ancestral hometowns and even their properties; zoom in to see what it looks like today; find old buildings, cemeteries, schools or churches relating to their lives, and more. Click here to watch a free video on using Google Earth for your genealogy.

Google Images

When using Google for genealogy you can also visualize your results. Google has a dedicated area for finding the images you want, like certain people, places or historical events: Google Images. Google Images will even narrow your results to certain parameters: black and white images only; maps or pictures of people only; photographs but not illustrations and–my favorite–images without copyright restrictions that you may re-use in your family history write-ups.

Google News Archive

Though no longer actively digitizing and indexing newspapers, Google News Archive can help you locate online content for specific newspapers. Click here to access its alphabetical listing of newspapers. You can also enter keyword-searches in the search box on that webpage for all the newspapers listed here.

Google Scholar

When you want to dig into scholarly articles, theses, dissertations and other academic sources, turn to Google Scholar. This resource specializes in searching the “smart stuff,” as I think of it. Sometimes you can find very specialized content, like a biography of a little-known minister or a history of a little tiny town. Read this inspiring story about using Google Scholar for genealogy!

Resource:

The Genealogist's Google Toolbox Third edition Lisa Louise Cooke

 

Ready to learn more about how to use Google for genealogy and mining it for your own genealogical treasures? The Genealogist’s Google Toolbox, is your go-to resource!  In its chapters–fully revised and updated –you’ll learn more about all these Google tools and more. Better yet, after you learn how to use these tools for family history research, you’ll find yourself using them to find all kinds of things, from recipes to trivia, to a manual for your old car.

Use Evernote for Genealogy files

It’s Nice to Share

I’ll bet you have friends who would benefit from this article on how to use Google for genealogy. Share it and they will be doing the genealogy happy dance, and so will I!

Here are some handy sharing buttons, or just copy and paste the URL for this article into a Facebook post or email. Thanks!

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