O'Hara Reagh (No.2) family genealogy

ARTHUR REAGH (or Art riabhach), brother of Dermod who is No. 111 on the "O'Hara" (No. 1) pedigree, was the ancestor of O'Hara Reagh (or "the grey-haired)."

111. Arthur Reagh O'Hara: second son of Hugh.

112. John: his son.

113. John Oge: his son.

114. Donoch: his son.

115. William: his son.

116. Arthur (2): his son.

117. Corc Caisiol [1] ("caiseal:" Irish, a bulwark): his son; a quo O'Caiseil, anglicised Cassell and Castles.

118. Felim: his son.

119. Dermod: his son.

120. Dermod Reagh O'Hara Reagh: his son.


[1] Caisiol: This word is compounded of the old Irish cas, "a house" (Lat., Ital., and Span. casa), and iol or aoil, Irish, "lime;" so that caisiol signifies "a building of stone and lime mortar." Whence the house or court of the Kings of Cashel was called Caisiol, at least as early as St. Patrick's time: a fact which proves that the old Irish knew and practised the art of building with stone and lime mortar, before the introduction of Christianity into Ireland.

According to Giraldus Cambrensis, the Castle of Pembroke was, by Arnulphus de Montgomery (son of the great earl of Shropshire, and son-in-law of Mortogh Mór O'Brien, King of Ireland, who died A.D. 1119), built with sods or twigs lined about with sods of earth: "ex virgis et cespite tenui." It would therefore appear that the English people at that time knew nothing of the art of building with stone and mortar; "since," says Dr. O'Brien, "so great and opulent a man as Arnulphus did not put it in practice with regard to his Castle of Pembroke; which was the more necessary, as he designed it for the preservation of the conquest he had made of the county of Pembroke. As to the old Britons, so far were they ignorant of the art of building stone work, that when Ninian, who converted the southern Picts, built his church of stone and lime mortar, they called it Candida casa or `white house;" being the first structure of the kind, as Bede observes, that was seen in Britain."