Katherine O'Brien, Baroness Clifton (of Leighton Bromswold) (1673-1706) (1673–1706) Parents Katherine Stuart, Baroness Clifton (of Leighton Bromswold) Henry O'Brien, Lord Ibrackan Children Catherine Hyde Theodosia Bligh, 10th Baroness Clifton Edward Hyde, Viscount Cornbury Siblings Donogh O'Brien, Lord Ibracken Mary O'Brien George O'Brien Partners Edward Hyde, 3rd Earl of Clarendon