In a message dated 6/25/2011 2:02:39 P.M. Central Daylight Time, cain@umich.edu writes: I internet searched (Google) on Cooey-na-Gall O'Cathain and found, for what it is worth, the following: http://en.wikipedia.org/wiki/O'Cahan wherein is says the translation is "Cooey-na-Gall" means "Terror of the Stranger." The name in Irish is Con muighe na nGall. This O Cathain in the O'Clery genealogies is the son of Magnusa chatha duin, or Manus of the battle of Downpatrick, sl. 1260. 487. (col. a) Domnall ballach m Ruaidri m Maghnusa m Donnchada' an einigh m Seaain m Aibhne m Diarmada m Con mhuighe m Diarmada m Con muighe na nGall m Magnusa chatha duin m Ruaidri m Domhnaill m Eachmharcaigh m Raghnaill m Iomhair m Gilla Crist m Con cionaedh m Diermada m Cathusaigh m Cathain (a quo .h. Chathain) m Drugain m Concobhair m Fergail m Maile duin m Maile fithrigh m Aedha uaiiriodhnaigh m Domnaill ilcealccaigh m Muircertaigh m Muirethaigh m Eogain m Neill noigiallaigh. For the McHenrys see this paragraph in O'Clery: 491. (col. c) Gofraid m Giolla padraicc m Semais m Giolla patraic m Concobair m Diarmada m Enri (o tat clann Enri) m Diarmada m Con muige na nGall m Magnusa catha duin The first McHenry would have been Dermot (Diarmada) son of Henry (Enri). He was the great-grandson of the same Conmuighe na nGall. That would place him sometime c. 1400-1450. John