Donogh O'Brien, 4th Earl of Thomond

Irish nobleman and soldier (1501–1624)

Parents

• Una O'Brien
• Connor O'Brien, 3rd Earl of Thomond

Children

• Barnabas O'Brien, 6th Earl of Thomond
• Teige O'Brien
• Margaret O'Brien
• Henry O'Brien, 5th Earl of Thomond

Siblings

• Daniel O'Brien, 1st Viscount Clare
• Honora O'Brien
• Mary O'Brien
• Teige O'Brien
• Lady Honor O'Brien
• Margaret O'Brien

Partners

• Helen Roche
• Lady Elizabeth FitzGerald
• Joan FitzMaurice