Cathal Ainrí Ó Néill, or Charles Henry O"Neill, was the chieftain of the O"Neill dynasty of Clandeboye,, from 1855 until his death.
Background
The son of Felix-Cunningham O"Neill, Esq., and Mary O"Neill, (who was the daughter of Bernard O"Neill of Ballygrooby and Dunmore and Mary the daughter of John O"Neill, Esq of Muinterevelin in County Tyrone), Charles Henry was a Dublin Barrister, born at Feeva House in County Antrim near present day Toomebridge on 25 December 1809. He married Mary Adeline Louise O"Grady, daughter of James O"Grady, Esq.
Career
Of the Dal Cassian family, and they had one child. He was the lineal descendant of the last Chieftain of Clanaboy, Brian mac Féilim Ó Néill, through Briain"s son and the last Tanaiste of Clanaboy, Con mac Briain Ó Néillinois In a matter of great dispute, while Charles Henry became recognised as The O"Neill Clanaboy, John O"Neill, 3rd Viscount O"Neill was able to supersede the will by which he had inherited himself, and leave the Shane"s Castle estate by his own will to William Chichester, who assumed the surname O"Neill and became William O"Neill, 1st Baron O"Neill.
Elizabeth married the Judge James Gervé Conroy and migrated to Saint John"s, Newfoundland in 1872, where their Dublin born son Charles O"Neill Conroy grew up and has surviving issue.