Henry Albert de Vreque O'Brien-ffrench, 1st Marquess of Castel Thomond
type: Person
description: (1862-1933)
birth date: 1862-03-07
death date: 1933-11-10
parent: Acheson Jeremy Sydney ffrench
parent: Anna Clarke Watton
spouse: Winifred Thursby
children: Rollo Adrien Vladimir Thursby Marie Altieri O'Brien-ffrench
children: Conrad O'Brien-ffrench
children: Alexis Evelyn Henry O'Brien-ffrench
children: Winifred Gisela Yvonne Castelthomond O'Brien-ffrench
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citations:
  source: The Peerage
  stated in qid: Q21401824
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  served at: 2026-08-10T13:09:11.817424Z
  entity updated at: 2026-05-03T16:20:22.557058+00:00Z
  entity created at: 2026-05-03T14:03:38.246394+00:00Z