Lady Penelope O'Brien
English courtier
(b. 1616)
Parents
Anne Fermor
Barnabas O'Brien, 6th Earl of Thomond
Children
Mary Howard, Duchess of Norfolk
Siblings
William Crichton of Sanquhar
Henry O'Brien, 7th Earl of Thomond
Partners
Henry Mordaunt, 2nd Earl of Peterborough