Barnabas O'Brien, 6th Earl of Thomond Irish politician (1590–1657) Parents Lady Elizabeth FitzGerald Donogh O'Brien, 4th Earl of Thomond Children Henry O'Brien, 7th Earl of Thomond Lady Penelope O'Brien Siblings Henry O'Brien, 5th Earl of Thomond Teige O'Brien Margaret O'Brien Partners Anne Fermor
