Helen Haldane Peerage person ID=200575 (1702–1777) Parents John Haldane Helen Erskine Children Katherine Duncan Adam Duncan, 1st Viscount Duncan Helen Duncan Alexander Duncan, 4th of Lundie John Duncan Margaret Duncan Siblings James Haldane Margaret Haldane Robert Haldane, 1st of Airthrey and 17th of Gleneagles John Haldane Patrick Haldane, 16th of Gleneagles Ann Haldane Mungo Haldane Partners Alexander Duncan, 3rd of Lundie