Mary O'Brien

(1662-1683) (1662–1683)

Parents

• Henry O'Brien, Lord Ibrackan
• Katherine Stuart, Baroness Clifton (of Leighton Bromswold)

Children

• Henry FitzGerald, Lord Offaly

Siblings

• George O'Brien
• Donogh O'Brien, Lord Ibracken
• Katherine O'Brien, Baroness Clifton (of Leighton Bromswold)

Partners

• John FitzGerald, 18th Earl of Kildare