James O'Brien
Irish politician
(1695–1771)
Parents
Mary Villiers
William O'Brien, 3rd Earl of Inchiquin
Children
Edward Dominic O'Brien
Henrietta O'Brien
Anne O'Brien
Murrough O'Brien, 1st Marquess of Thomond
Siblings
Lady Henrietta O'Brien
Charles O'Brien
Lady Mary O'Brien
William O'Brien, 4th Earl of Inchiquin
Partners
Mary Jephson