Lady Margaret O'Brien

Peerage person ID=24655 (1606–1681)

Parents

• Mary Brereton
• Henry O'Brien, 5th Earl of Thomond

Children

• Mary Somerset

Siblings

• Lady Honora O'Brien
• Lady Anne O'Brien
• Lady Elizabeth O'Brien
• Lady Mary O'Brien

Partners

• Edward Somerset, 2nd Marquess of Worcester
• Donogh Kearney