His great-great-uncle was Ontario premier Sir Oliver Mowat, and his father, Angus Mowat, was a librarian who fought in the Battle of Vimy Ridge.
Stră-străunchiul său a fost Sir Oliver Mowat, al 3-lea premier al Ontario și tatăl său, Angus Mowat, a fost un bibliotecar care a luptat în Bătălia de la Vimy Ridge.