In a message dated 8/2/2011 4:55:47 A.M. Central Daylight Time, ikennedy_msdn2@hotmail.com writes: AI1123.2 Donn Cuan Ua Cennetich quieuit Is that a 'surname'? Impossible to say, on its own. If his father and brothers and sons and nephews are also named maybe you can get somewhere. That is difficult to tell. The Kennedy pedigree has several Donn Cuans listed. GENELACH UI CEINNEIDIGH 1966. Aedh m Murchadha m Briain m Ruaidri m Amhlaibh m Giolla caoimghin m Donnchadha m Giolla caoimhghin m Taidhg m Domnaill cata letrech m Giolla caoimgin m Taidhg m Mathghamhna m Duinn cuan m Aedha m Cinneidigh m Duinn chuan m Cindeidigh m Lorcain m Lachtna. My own guess is he might be the second one. But he is literally the grandson of Cinneidigh so that isn't necessarily a surname. The first Duinn chuan would be a brother of Brian boruma, sl. 1014. Three generations up to the next Duinn cuan would put him at about the right date in 1123. A son of his is listed among the casualties of the battle of Clontarf (Conaing, son of Donncuan, son of Cenneidigh,). The next reference I see from Ireland in maps is: M1159, Gillacaeimhghin Ua Ceinneidigh, lord of Ormond, died on his pilgrimage at Cill-Dalua. Other sources give the name as: 1159 And a large force of [and the son of Gilla-Ciarain Ua Cennetigh I don't know if this fits the Giolla caoimgin son of Taidhg in the pedigree or not.. M1164, Amhlaeibh, son of Gillacaeimhghin Ua Ceinneidigh, lord of Ormond, was blinded by Toirdhealbhach Ua Briain. This looks like a surname to me though, especially if the Gilla caoimgin is the same one in the pedigree. He has no grandfather named Cinneidigh to which Ua can refer. John