Monday, August 21, 2017

A Relationship Outlier

Blaine Bettinger runs the Shared Centimorgan Project in which he's collected thousands of data points for amount of DNA shared between people with known relationships.  He can give a range of DNA which has been observed to be shared for people with specific known relationships.  If you have a new DNA match, you can see how much DNA you share with that person and use Blaine's chart to identify potential relationships that are possible with that person.
Shared cM Project.  From  Used with permission.

Sunday, August 20, 2017

An Issue With Lazarus

I've written about Lazarus before, a tool available via GedMatch which allows for you to reconstruct a partial genome of a deceased ancestor using living relatives' DNA.  Lazarus requires you to put direct descendants of this ancestor into Group 1 and other relatives of that person in Group 2.  The idea is that if a segment is shared between a descendant of that individual as well as by one of his or her cousins, that segment can be attributed to the deceased ancestor (weeding out segments that come from other ancestors of those in Group 1).  Particularly when dealing with endogamy, there could be extra segments introduced, but that's not the point of this post.

Enough of my relatives have tested that I've been able to create Lazarus kits for multiple ancestors.  But I've been noticing some odd results for many of them.  Here's one example, in trying to recreate my grandfather's genome.
My Uncle's Shared Segments with Don

Sunday, August 13, 2017

Long Segment--But No Close Connection

Particularly when dealing with endogamy, where it is difficult to tell apart cousins who are actually relatively closely related as opposed to those who are very distantly related in multiple ways, a good metric to hone in on matches who may actually be related in genealogically-traceable time is the size of the largest shared segment of DNA.  I've had good success finding people who are actually related or at least are from a very close geographic proximity to one of my ancestral towns, even if we can't find the actual paper trail connection.

But sometimes those large segments may be passed down for many generations.  Several of my kits--all related on my maternal grandmother's side--share the same large segments with several kits administered by a man named Luc.
Luc's Tested Family Members--With DNA Shared With My Relatives

Sunday, August 6, 2017

Another Generation of Diamonds?

I had tested my father's Y DNA several years ago.  As is not uncommon for Jews (who have not had surnames for too long), he had no matches with the surname Diamond besides his second cousin who I'd also tested--but had lots of matches with lots of people with Jewish surnames.  But then about 2 months ago a new match popped up--with the surname Diamond.
The first match is Uncle Leibish's grandson.  The second is this new match

Sunday, July 30, 2017

Tkatch-ing Up to the Sanshucks

Through my Shpikov/Krasnoye project, I've obtained lots of vital records for both towns over the past few years.  After a first large batch of records helped me to unravel my Sanshuck and Brandman families, the few years' worth of records I got since then weren't too helpful--or so I thought.

Ukraine SIG obtained a large batch of records recently (an entire list of what they got can be seen here), and I got very excited to see some Krasnoye records listed which were new to our project.  My initial scan through the documents was disappointing, as I didn't see any Sanshucks or Brandmans.  But then I looked more closely.  There were vital events for some Tkatch brothers--and the names of those brothers, their wives, and their father exactly matched those of Krasnoye's Sanshuck brothers.  I looked back at records I'd transcribed previously and there they were again.
Marriage of Yitzchok son of Yisrael Tkatch (my 5th great uncle) and Reiza daughter of Dovid Grupenman, 1842
(This isn't from the latest batch of records since I can't share those images--but I've had this for a few years without knowing they were really Sanshucks!)

Tuesday, July 25, 2017

IAJGS Conference, Days 2-3

(I'll be blogging about IAJGS2017 all week.  You can see all IAJGS2017 posts here and posts for all IAJGS conferences I've attended here.)

I made the highlights clip for Day 1!  You can see it here (I'm right at the beginning), and you can also see the whole talk if you have a LIVE! subscription.

On Monday (day #2) of the conference, I started off with a FamilySearch breakfast (shout out to them for including boxes of cold cereal & milk, so I was actually able to eat something) where they discussed the potential for FamilySearch and some of the project/SIG leaders to work together.  Some of the SIGs already have agreements for joint projects with FamilySearch.
My Second Talk of the Conference

Sunday, July 23, 2017

IAJGS2017, Day 1

(I'll be blogging about IAJGS2017 all week.  You can see all IAJGS2017 posts here and posts for all IAJGS conferences I've attended here.)

Today got off to an early (6:15AM) flight to Orlando.  We were at the hotel by 9:30, and then it was off for registration and to start the day!
All Registered!