William O'Brien, 3rd Earl of Inchiquin

Irish Earl (1662–1719)

Parents

• Margareth Boyle
• William O'Brien, 2nd Earl of Inchiquin

Children

• Lady Henrietta O'Brien
• Charles O'Brien
• Lady Mary O'Brien
• James O'Brien
• William O'Brien, 4th Earl of Inchiquin

Siblings

• Lady Margaret O'Brien
• unknown son O'Brien
• Henry O'Brien

Partners

• Margaret O'Brien
• Mary Villiers