father of Capt. J. Kenway Simcoe; son of Elizabeth Posthuma (nee Gwilliam) and Hon. John Graves Simcoe; brother to 10 siblings including Frank (Francis) and Sophia;
daughter of Elizabeth Posthuma (nee Gwilliam) and Hon. John Graves Simcoe; sister to 10 siblings including Frank (Francis) and Rev. Henry Addington Simcoe;