What is your first instance of Pedigree Collapse?

+12 votes
625 views
My first known location of Pedigree Collapse occurs with my 6th Great grandparents.  Elijah Ricker is the brother of Nancy Ann Ricker both are children of John K Ricker and Mary Delilah Lyles.  Thus my Grandmother, Bertha McCoy and my Grandfather, her husband, Virgil Melvin Stills share common ancestors.  They are 3rd Cousins.

Where does your occur?
asked Jun 8, 2015 in The Tree House by Michael Stills G2G6 Pilot (320,130 points)
retagged Jun 8, 2015 by Keith Hathaway
Oh, don't ask that question to an Acadian! LOL!
Wasn't aware of a name for those tangled branches on my tree - thank you Michael :D

I am not sure if this works, let me know.

Here is a link to a screen shot of my RootsMagic Software.  I did a relationship calculator and discovered that I am related to myself many times over.  Many are from Tennessee.

https://www.dropbox.com/s/rjim9ciroty2uqo/Michael%20In-Bred.jpg?dl=0

I once had a handwritten tree with 15 (?) generations.  There were several collapses.That tree is packed somewhere.

Is there way to find this information on WikiTree without testing the relationships of many ancestors?
Nifty RootsMagic feature - not as many cousin connections as I thought there would be. I'm my 5th cousin, 8th (twice) and my 9th cousin.  Guess most of the entanglements are my ancestors siblings which I've deleted from the RootsMagic program.
Kristina, The main Wikitree chart shows 5 generations and the Compact Family Tree shows 8.  There is no other way to see more generations one page.  You would need to expand each end of the branch one at a time.
Rolling on the floor laughing, I have so many pedigree collapse items my tree looks like a plate of spaghetti in parts.  The worst offender, if I may so term him, is a man who married twice, had oodles of children.  He is my 8th  great-grandfather and 9th great-grandfather 4 times through 4 of his children from his first wife, and another time 8th ggf through one of his children with his second wife.  There are repeat scenarios all over my tree, the most recent being the fact that my nephew and niece through my oldest brother are also my 4th cousins.
Are you saying that you descend from this 8th or 9th great grandfather in five distinct paths?

I have a similar situation.  I suspect that the amount of DNA I have from this ancestor is five times the amount I would expect to get.   

Then, when I find a cousin, the DNA comparison software is fooled by the over abundance of DNA from this ancestor. What is the best way to measure the "degree of relationship " ?  Should we use cM figures? I share  2654 cM with Jeff and 1994 with Susan.   Therefor I am more closely related to Susan.
Yes, 5 of his children are my direct ancestors.

Degree of relationship becomes quite the poser with multiple kinship.  I have an Australian cousin with whom I am related through her mother's line (both sides for me).  Back in the era where all the connections happen that connect us, I have repeatedly gotten myself into pedigree collapse, for example I am descended from 2 of Philippe Matou's daughters, my cousin from a third.  Repeat the scenario with 2 Garnier sisters for me, my cousin having the 3rd.  We have others also.  It's all pretty far back in time, and wikitree program will only calculate the closest relationship, which works out to 9th cousins or so.  But multiply that by the number of common ancestry we have, and it gets closer to 7th cousins.

5 Answers

+5 votes
My 4th great grandparents are distant cousins, Silvanus Conant and Silvia Conant. They share the same great grandparents, Nathaniel Conant and his wife, Hannah Mansfield.
answered Jun 8, 2015 by Frank Gill G2G Astronaut (1,288,060 points)
+4 votes
My ancestors that settled on Shelter & Gardiners Island - Long Island Ny were an interesting bunch to put it mildly.
answered Jun 8, 2015 by Doug Lockwood G2G Astronaut (1,630,220 points)
+7 votes
Despite my "Don't ask" comment I added to the question, I'll give an answer anyway.

Let me start by stating that I am an Acadian, which is an endogamous population, which means my ancestors had limited choice when finding a partner, so distant cousins often married.

So, my parents are 5th cousins, and my grandparents are second cousins once removed on one side and third cousins on the other side.

I do have to say that those multiple common ancestors do make it easier to fill out multiple generations of my tree!
answered Jun 8, 2015 by Roland Arsenault G2G6 Mach 4 (46,130 points)
I don't know Roland, it sounds a lot like the Appalachian Mountains.  I never met so many "cousins" as when I went to Greeneville, TN.  I am my own 5th cousin.

My belief is that this is more common than people think for the very reason you stated.
Yup, I think it's common with many group of settlers who moved to new lands.
+5 votes

Since my paternal grandparents were first cousins already I have given up on identifying the numerous distant cousin marriages in my tree. In my area of origin the majority of people were serfs prior to 1848, so they could not move without permission and if some family lives in a village for 5 generations what's the likelyhood they are not related to the rest of the village? Or the half a dozen or more adjoining villages?

answered Jun 8, 2015 by Helmut Jungschaffer G2G6 Pilot (334,000 points)
+5 votes

Well, the most recent fairly close relationship between spouses in my tree is between my great great grandparents, Albert Richard and Arthemise Ducharme, who were second cousins. But since my dad's side is completely French, inevitably I ended up finding a connection between my grandparents on that side. They were 7th cousins, once removed.

answered Jun 8, 2015 by Lianne Lavoie G2G6 Pilot (384,650 points)

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