The Irish for Farrell is Ó Fearghail meaning a descendant of Fearghal. They are thought to be a branch of the Conmaicne Réin clans which inhabited an area now corresponding approximately to the southern portion of modern county Leitrim where they migrated to between AD c.500 and AD c.525 from northeast Galway. They moved southwest to the modern county Longford between AD c.900 and c.1100. In Irish mythology the Conmaicne clans are descended from Conmhac ( hound-son ) who was son of Fergus Mac Róich, king of Ulster and a central figure in the famous saga from early Irish literature called Táin Bó Cúailnge. He was foster-father to the famous Cú Chulainn who saved Ulster.


  1. Frances (Fergie) of Lackan (Laghy) Co Donegal
  2. Thomas Ferrell b.1778 d.1853 of Lackan m. Isabella Clarke of Rossnowlagh in 1801.
  3. John Farrell b.1821 d.1895 m. Catherine Hannah in 1854 at Rossnowlagh
  4. Robert John Farrell b.1866 d.1915; m Mary Jane Thompson in 1896 at Rossnowlagh
  5. Maurice Benjamin Farrell b.1899, Dublin; d.1956, Cavan

Vital Records

1911 Census Whitworth Road (Drumcondra, Dublin)
Surname Forename Age Birthplace Occupation
Farrell Robert John 44 Co Donegal Detective Sergeant D U Police
Farrell Mary Jane 34 Co Donegal -
Farrell Robert Thompson 12 Dublin City School Boy
Farrell Maurice Benjamin 11 Dublin City School Boy
Farrell Kathleen Isabel 4 Dublin City -

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