Donogh O'Brien, 4th Earl of Thomond Irish nobleman and soldier (1501–1624) Parents Connor O'Brien, 3rd Earl of Thomond Una O'Brien Children Teige O'Brien Margaret O'Brien Henry O'Brien, 5th Earl of Thomond Barnabas O'Brien, 6th Earl of Thomond Siblings Daniel O'Brien, 1st Viscount Clare Teige O'Brien Mary O'Brien Honora O'Brien Lady Honor O'Brien Margaret O'Brien Partners Lady Elizabeth FitzGerald Joan FitzMaurice Helen Roche
