Katherine McCausland (c. 1770-1821) (1770–1821) Parents John McCausland Children David Plunket unknown daughter Plunket Robert Plunket Patrick Plunket John Plunket, 3rd Baron Plunket Isabella Katherine Plunket Elizabeth Plunket unknown daughter Plunket William Conyngham Plunket Thomas Plunket, 2nd Baron Plunket Partners William Plunket, 1st Baron Plunket