RE: [AZORES-Genealogy] Re: Family Finder Matches to the British Isles and Ireland

[pico]

Nice info, Kalani.

There is a person in my Family Finder matches who must be one of these IBS links. She did lots of research and it goes way back into TN, KY etc with no hint of any Iberian or Azorean ancestry. She shares a total of 31.66 cM with me and is a projected 4th cousin - remote cousin. In case she's showing up in others matches, her name is Barbbette Hopkins Von Halle.

Of the 10 segments we share, 13.1 cM is the longest and so according to your quoted chart would be a 99% chance of a common ancestor. But I think it falls into the other category.

When I can't even find connections to people with known Azores ancestry and know back to the 1600s in many cases, I think the chances of someone like above has pretty much zero Azores ancestry and is IBS. And no chance in Hades she's a fourth cousin.

And with so many Germanic matches on my maternal side, I think a great many of them are also IBS. Maybe they have that "Germanic look" and no actual common ancestry.

Doug da Rocha Holmes
Pico & Terceira Genealogist

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-------- Original Message --------
Subject: [AZORES-Genealogy] Re: Family Finder Matches to the British
Isles and Ireland
From: Kalani N <mamoah...@gmail.com>
Date: Fri, August 08, 2014 12:16 pm
To: azores@googlegroups.com

I'm aware of the Flemish and other groups that peopled the Azores, but this has always been my issue nearly a year now, where I believe some of this may be IBS (identity by state), although some people try to argue me against this.  This would mean basically people have similar genes/allelles in any given population, although at one point in time, people inherited this trait from a person.

So say a certain population many people will have freckles and red hair, and scattered randomly throughout a given population. That is due to IBS, and maybe some segments are basically just that.  Then you have IBD (identity by descent) where you actually do have a MRCA (most recent common ancestor) within a genealogical time frame.

But this is where the math/statistics come in.  I don't know how much are you talking about.  10cm?  7cm?  You can use this as a guide:

http://www.isogg.org/wiki/Autosomal_DNA_statistics

cM	% IBD	% IBS
10	99	1
9	80	20
8	50	50
7	30	70
6	20	80
5	5	95

See the link and scroll down to the section of IDENTICAL BY DESCENT SEGMENTS.  Based on John Walden's research (not sure who he is) he came up with that list.  So if you share 10cM, that is a 99% chance of it being IBD.  If it's 7cM, there is a 30% it's IBD, but a 70% IBS.

I've been seeing a few of my small matches mostly where I know they cannot have a connection to me.  Someone else said it wasn't IBS, but the fact is there is no known study (that I'm aware of) that addresses this issue.  This is all new.

Kalani

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