Dewdney is the son of Canadian artist and author Selwyn Dewdney, brother of Alexander Keewatin Dewdney, and the great-grand-nephew of Edgar Dewdney (Lieutenant-governor: British Columbia 1892—1897, Northwest Territories, 1881—1888).
Christopher Columbus | Christopher Walken | Christopher Lee | Christopher Wren | Christopher Plummer | Christopher Reeve | Christopher Lloyd | Christopher Lambert | Christopher Kasparek | Christopher Hogwood | Christopher Marlowe | Christopher Hitchens | Christopher Guest | Christopher | Christopher Tolkien | Christopher Isherwood | John Christopher | Christopher Fry | Christopher Alexander | Christopher Kane | Christopher Hatton | Christopher Banks | Dennis Christopher | Christopher Wordsworth | Christopher Larkin | Christopher Cockerell | Christopher C. Kraft Jr. Mission Control Center | George Christopher | Christopher Wheeldon | Christopher Nolan |
It is known for publishing early works by writers such as Fred Wah, Daphne Marlatt, Margaret Atwood, Michael Ondaatje, Ann-Marie MacDonald, George Bowering, Nicole Brossard, Gwendolyn MacEwen, Christopher Dewdney, bpNichol and Anne Michaels, Darren O'Donnell, Sean Dixon, Greg MacArthur, Matthew Heiti and Amiel Gladstone.
Their children were: Donner Dewdney, a child psychiatrist, known for discovering the facial distortion effect among schizophrenic children; Alexander Dewdney, a mathematician, author, conservationist, environmental scientist and naturalist; Christopher Dewdney, a Canadian poet; and Peter Dewdney, a photographer and gold prospector.