Una O'Brien (died 1589) (d. 1589) Parents More O'Carroll Turlogh O'Brien Children Teige O'Brien Lady Honor O'Brien Donogh O'Brien, 4th Earl of Thomond Margaret O'Brien Mary O'Brien Honora O'Brien Daniel O'Brien, 1st Viscount Clare Siblings Honora O'Brien Partners Connor O'Brien, 3rd Earl of Thomond