Ó Conghalaigh

Rev Patrick Woulfe
1923

Ó CONGHALAIGH—IO Connally, O Connolly, O Conely, Connolly, Connelly, &c.; 'descendant of Conghalach' (valorous, derivative of Conghal); the name (1) of a family of the southern Ui Neill who were seated in East Meath until dispossessed soon after the Anglo-Norman invasion, when they settled with the MacMahons in Co. Monaghan, where they became very numerous; (2) of a Dalcassian family in Thomond who are said to be descended from Mahon, the brother of Brian Boru; (3) of a branch of the Ui Maine in Co. Galway, of the same stock as the O'Maddens; and (4) of a Roscommon family. The anglicised forms of this surname cannot always be distinguished from those of Ó Conghaile, Ó Coingheallaigh, Mac Conghaile, &c.

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