Henry O'Brien, 5th Earl of Thomond Irish earl (1588–1639) Parents Donogh O'Brien, 4th Earl of Thomond Lady Elizabeth FitzGerald Children Lady Margaret O'Brien Lady Elizabeth O'Brien Lady Mary O'Brien Lady Anne O'Brien Lady Honora O'Brien Siblings Barnabas O'Brien, 6th Earl of Thomond Teige O'Brien Margaret O'Brien Partners Mary Brereton
