Lady Mary O'Brien

(died 1686) (d. 1686)

Parents

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

Children

• William Cokayne
• Brien Cokayne, 2nd Viscount Cullen
• Charles Cokayne
• Mary Cokayne

Siblings

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

Partners

• Charles Cokayne, 1st Viscount Cullen
• George Blount