Katherine Stuart, Baroness Clifton (of Leighton Bromswold) (1640-1702) (1640–1702) Parents Katherine Stuart George Stewart, 9th Seigneur d'Aubigny Children Donogh O'Brien, Lord Ibracken Mary O'Brien George O'Brien Katherine O'Brien, Baroness Clifton (of Leighton Bromswold) Siblings Charles Stewart, 3rd Duke of Richmond Partners Joseph Williamson Henry O'Brien, Lord Ibrackan