Hi, Hi, My names is Carol Simpson and Sir George Simpson was my 4th Great Grandfather. Sir George Simpson's Father was Thomas and his Mother Isobel MacKenzie Thoamas's Father was James Simpson from Scotland and his Mother was Janet Young. Isobels father was George MacKenzie and her Mother was Elizibeth Forbes. All of Scotland. Sir george Simpsons son John MacKenzie Simpson was born to Margaret Taylor his 3rd wife. I have found a listing for a Mistress in Lachine Quebec taht had a son named James Kieth Simpson. Apparently he had this mistress until he died. Hope this helps Thanks! Carol Simpson