Helen Mercer Peerage person ID=544545 (b. 1696) Parents Sir Laurence Mercer of Aldie Helen Mercer of Aldie Children Thomas Ogilvy Sir John Ogilvy of Inverquharity, 5th Bt. David Ogilvy Siblings Grizel Mercer James Mercer of Aldie Jean Mercer of Aldie Partners Sir John Ogilvy of Inverquharity, 4th Bt.