My blogpost Segment Size vs Cousinship on Nov 7 includes a chart which is designed to show possibilities. An actual relationship is hard to pin down just on total cMs. The curves are centered on the average calculated values for each cousinship, and some of the tails are based on experience of many users. The shape of the curves are guesstimated, but they give you a rough idea of what's going on. In your case, the different possibilities may have different ancestries, which would give different atDNA Matches which might help sort it out. Jim - www.segmentology.org > On Dec 20, 2015, at 3:13 AM, Patti Hacht via <genealogy-dna@rootsweb.com> wrote: > > I have used 23andMe, Robert. > > I don't expect anyone to spend a lot of time on my query. I just wondered > if it was possible (yet) to figure out what the three "brother's" > relationships might have been. Maybe they were really cousins. Or an uncle > and two nephews. . . > > Thanks for any help. > > Patti > Lakeville, MIchigan > > >> Patti >> Out of curiosity which testing company did the testing and where are you >> doing the comparisons? >> >> Ftdna / family finder has a requirement that people share more than 20cM >> before they show as a match, This can prevent some matches in common from >> showing. >> >> My county Mayo ancestors from the 1820's lived in a small village and I >> think 1/2 the people in the village shared the same surname and many of >> them >> carried the same very common first names. It also looks like there were >> some >> cousin marriages and double cousins. >> >> RPaine >> >> -----Original Message----- >> From: Patti Hacht via >> Sent: Saturday, December 19, 2015 7:11 PM >> To: genealogy-dna@rootsweb.com >> Subject: [DNA] Three brothers from 1800's and recent DNA matches. >> >> I have a question regarding three Irish brothers. >> >> For forty plus years I have been researching my Purtell line from near >> Kilcolman (Shanagolden area) of Co Limerick, Ireland. I discovered my 2nd >> gr-grandfather, John Purtell b cir 1816 probably in Kilcolman parish. In >> the Kilcolman Parish rcds, I find a Laurence Purtell who was the sponsor in >> several of John's children's baptisms. I have thought that Laurence might >> be John's brother as he was born abt 1810. Laurence emigrated to >> Binghamton, NY about 1849. About a year later, my John followed Laurence to >> Binghamton, NY. Within four years, my John had moved further west to >> Michigan. Then there was a Robert Purtell, said to be related somehow to my >> John. Robert was born abt 1808 (probably Kilcolman) and emigrated to >> LaSalette, Ontario, Canada in the 1840's. Members of Robert's family >> eventually made their way to Midland, Michigan. >> >> Enter DNA testing. My brother and my Uncle (who's mother was a Purtell) >> both DNA match the great grandson of Robert Purtell from LaSalette. (My >> sister and I do *not* match the LaSalette Purtell's.) And now my brother >> and "Purtell" uncle also match a descendant of Laurence's from Binghamton. >> >> My question is, is there a way (using our DNA matches) to figure out if >> Robert b 1808, Laurence b 1810 and John b 1816 might have really been >> brothers? >> >> I don't post much to this list because I just don't understand very much >> about the testing. >> >> Thanks for any help, >> >> Patti in Lakeville, MIchigan >> >> ------------------------------- >> To unsubscribe from the list, please send an email to >> GENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without the >> quotes in the subject and the body of the message > > ------------------------------- > To unsubscribe from the list, please send an email to GENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message