Lady Sophia Erskine Peerage person ID=413794 (1650–1734) Parents John Erskine, 21st Earl of Mar Jean Mackenzie Children Alexander Forbes, 4th Lord Forbes of Pitsligo Mary Forbes Siblings Lady Jean Erskine Lady Barbara Erskine Charles Erskine, 22nd Earl of Mar Lady Marie Erskine Partners Alexander Forbes, 3rd Lord Forbes of Pitsligo