By DNA match, I have a 3rd to 5th cousin, currently in Ireland, by the name of Bernie O'Sullivan. I have found her parents, her grandparents and her 2gg where I believe the connection lays. The 2g grandparents are Daniel Sullivan (1873-1921) and Bridget Brennan (1886-1959). They were married 29 Nov 1902 in Caherciveen, Kerry, Ireland and witnessed by Denis Sullivan and Ellie Brennan. Bridget's parents were Michael Brennan (1859-?) and Mary Sullivan (1864-?). They were married on 16 Feb 1878 in Killemlagh, Kerry. They are present in 1901 census in Glanlough Lower (Castlecove) with their children: Bridget; Patrick and James. So the thing is how is Michael related to me? My 2gg was Cornelius Brennan, born in 1832, so Michael is probably an offshoot of one of Cornelius brothers? This is the first time I have found a crack in my brick wall, so any help would be greatly appreciated.