Féilim Ó Néill

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Féilim Ó Néill (sometimes anglicised Phelim/Felix O'Neill) (died 11 September 1709, in Malplaquet) was a member of the Clanaboy O'Neill dynasty, and the ancestor of the current Chief of this Catholic Lineage.


He was a descendant of Niall Noígíallach (Niall of the Nine Hostages), King of Tara (400), father of Eógan mac Néill (Baptized by Saint Patrick in 442), first Catholic King of Ireland, which descendants were Kings of Tara until the 9th century, Kings of Ireland from the 9th century to the 11th century, Kings of Ulster until the 15th century and Sovereign Princes of Tyrone and Clanaboy until the 16th century.


In the beginning of the 18th century he was dispossessed of all his assets through the confiscation applied to the Catholics of Ireland, which led him to emigrate to France. He was a cavalry officer who took part in many battles until, integrated in the Irish Brigade, he fought aside with the French against the British, the Austrians and the Dutch (during the War of the Spanish Succession), in the celebrated Battle of Malplaquet (settlement located in the former Province of Flanders, in Belgium, present-day France), and where he died on 11 September 1709.[1][2]

Marriages and issue[edit]

His first marriage was to Catherine Keating, of the noble family of that name, and they had a son, Conn (Constantine) O'Neill (Ireland, Leinster, Archbishopric of Dublin, Parish of Saint Catherine - ?)

His second marriage to The Hon. Joan O'Dempsey (– April 17, 1722), daughter of the Viscount Clanmalier, resulted in three sons: Brian O'Neill, Thomas O'Neill (died before 1756), and a third whose name is not documented.

See also[edit]


  1. ^ Anuário da Nobreza de Portugal, III, 2006, Tomo III, pg. 1.391
  2. ^ Armorial Lusitano, Lisbon, Portugal, 1961, p. 404

External links[edit]