MyHeritage’s Theory of Family Relativity

It seems as if every DNA and genealogy company is unveiling wonderful new features this week at RootsTech 2019 which makes me wish I was there. It will take me many posts to cover all the ones that excite me!

MyHeritage has just unveiled a cool new feature called the “Theory of Family Relativity.” The idea is to look at your tree and other trees in their database to see if the computer can figure out how you are likely to be related. When you click on the big pink View theories button at the top of your DNA matches page it will show you just the DNA matches for whom it thinks it has found the relationship.

What is exciting and different about this offering is that when you click on the “View theory” in the listing for a match it offers you several paths to view a graphical representation of the possible relationship including percentages of accuracy. It also indicates the trees or records the deduction was made from. Here is how it shows that with a known 5th cousin of mine. I had not known that she had tested nor had I been in touch, although I knew her family.


If you go to the match page of a match that has a theory, it will show you a compact view of the expected relationship at the top of the page without the tree names and percentages however it includes a click point to see the full theory.


Many of these theories take three or four trees to come up with the relationship unlike my Klauber cousin above. Here is an example perhaps too small to read (click on it to see a larger version)



My Norwegian father has 32 matches with relationship theories while I have only 13, Five of these I already knew about plus another one of his. Of the other eight, most are accurate except where there are errors in the trees used. I sent several messages asking for corrections already! However it may be several days before I finish working through my Dad’s matches.

The incorrect path usually happens when my ancestors were married more than once and the other tree has the wrong spouse as a parent.

Another problem I have is that my great granddad Henry H Lee, Hans Halvorsen Skjold in Norway, used different birth dates in every record and my 2nd cousin has his brother Halvard’s name listed for our great grandad in his tree which then matches to other trees incorrectly. All because my great grandad used his brother’s birth year. Click here for my blog post about that mystery.

How my great grandad is incorrectly linked to his brother, their parents are the acutal MRCA


Of course once one tree has an error, then more trees pick up that error. I can see that I will be sending many messages in the next few days, first however, I will connect with my new found distant cousins!

UPDATE 28-Feb-2019: This new feature is only available for users who have a site subscription or have uploaded their DNA and then paid the $29 to unlock all the DNA features. Click here for the blog post at MyHeritage which explains that and has more details about this feature.


18 thoughts on “MyHeritage’s Theory of Family Relativity

Click here to add your thoughts at the end of the comments
  1. Hi,
    I just checked all the dna I manage on MyHeritage and I’m not seeing the big pink box anywhere. Does that mean my tree with 3 dna link to it doesn’t have any or the new tool hasn’t gotten to my account yet?

  2. You will only see something if your tree matches with someone else’s tree and they also had a DNA test. I have 4 relativity matches.

  3. Ancestry has the same feature called ThruLines on your personal DNA results window right under your matches… It works very well ☺️

  4. Not seeing the big pink box yet, either, But it will come.
    (Probably tomorrow, just after I’ve gone to discuss the new features with DNA friends.)

    More importantly I see the name Skjold in one of the tree your showed.
    Some of my ancestral families came to Australia from Hamburg in 1841 on a ship named the Skjold. That was very early in this colony’s life, so lots of my DNA matches have connections back to that ship. I have many sort of “Mayflower moments” from that.

    • Christopher –
      You need a MyHeritage subscription or to have paid the $29 to get the DNA tools.

      Skjold means shield in Norwegian. It is also the name of a town in Rogaland as well as the name of my great grandad’s ancestral farm. A fine name indeed!

  5. I have an account that does not have a subscription and has not paid the $29. It sees four Theory of Family Relativity results. Thank you MyHeritage – shame they are a branch I already knew well.

    Two other similarly unpaid accounts with some of the same matches do not have a single Theory result. All 3 accounts have dna uploaded over a six months ago. Puzzled.

  6. I have a paid account with 5 kits I manage only one of them has the Family Relativity. I selected the filter and applied it to each kit, they all have trees. Any suggestions?

  7. My parents and I all have TOFR links but none of my four aunts and uncles that I manage. I called MyHeritage and was told that this was a known problem they are working on.

  8. I have dozens of theories, and I don’t have a subscription… I uploaded from another company more than a year ago.

    • Me too. I think maybe they are grandfathering-in those of us who helped them amass a larger, more commercially viable database, by uploading our results from elsewhere. Only problem is, I am reluctant to pay for yet another GG subscription so my tree is limited to 250 people, which makes it far less likely I’ll be able to identify previously unknown cousins through the TOR feature.

  9. Theory of Family Relativity 13 out of 13!!
    thrulines 0 out of unknown total. I gave up after finding match after match to my great grandmother’s 2nd husband’s first wife’s parents. I don’t need them. We are not related.
    I have consistently had better matching with MyHeritage. Now if Myheritage would use maiden names in the trees as default I’d be really excited. I’ve asked repeatedly but they won’t. Once you marry you are no longer the person you once were. You are now a new person with a new name. Better than the witness protection program!

  10. I have had major problems with the Theory of Family Relativity feature. First, it falsely identified me as being the same person as a distant relative on another tree, two years older and with a completely different name. MyHeritage tech support told me they fixed the problem but I wouldn’t see that until their next recalculation. I waited several months for that, only to find that all my Theories had vanished! Tech support declined to escalate my issue and blamed me because I uploaded a newer GED file and deleted my previous tree. This is no way to treat a customer who pays them $300 a year for a “Premium Plus” account. At this point, I am extremely dissatisfied.

    • So sorry for your troubles. I wrote to the various people whose trees generated incorrect results for me and now have better results. My own experience with customer support has been quite positive.

Leave a Reply to Kitty Cancel reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.