Paterson Ewen RCA D.Litt LL. D. (April 7, 1925 – February 17, 2002) was a Canadian painter. Ewen was a founding member of the Non-figurative artist's association of Montréal, along with Claude Tousignant, Jean-Paul Mousseau, Guido Molinari, and Marcel Barbeau. He moved to London, Ontario in the late 1960s where London Regionalism was championed by Jack Chambers and Greg Curnoe. It was in London that Ewen developed the gouged-plywood style that would become his hallmark.