Power; Poher, or Poncaer, descended from the Lords of Poncaer in Brittany. A branch settled in 1066 in Devon, with Alured de Mayenne; and in 1165 Ranulph Poer held three fees of his barony (Liber Niger). Bartholomew Poher, at the same time, was Lord of Blackborough, Devon, and father to Robert Poher, who settled in Ireland (source: The Norman People). According to the Peerages it was, however, Roger, not Robert de la Poer, who went with Earl Strongbow to the conquest of Ireland, and received vast grants of territory.
My brother's Y-DNA was a perfect match (at the 25 marker level) the DNA of a native Waterford, Ireland, researcher, who asserts that our mutual Powers lineage reaches back to Lord of Blackborough. Records in Ireland have been destroyed, so there may not be a paper trail to prove it.
Note: Correspondence indicated that my "...Irish ancestor, Michael, would almost certainly have spoken Irish (=Gaelic=Gaeilge) as his native language."