Members of the Taneda Karate Dojo competed in the 2015 Junior International Cup and USA Open in Las Vegas on the Easter weekend.
The competition is the largest karate tournament in the world and drew thousands of competitors.
Timur McNern, nine, won all four of his matches to win the gold medal.
His mother, Roza McNern, won gold in kumite and silver in kata.
Adam Doucette, 13, won his first three matches, advancing to the semifinals, where he finished in fifth place.
Doucette was scouted by the Canadian national team coaches and was recruited to be part of the Canadian team for the 12- and 13-year-old team kumite competition at the USA Open.
He and his two teammates from Quebec faced teams from Germany, the United States and Mexico, placing fifth of the 17 teams.
Caitlyn Riddle won bronze in the 10-year-old girls kata and kumite divisions.
Rita Becker won silver in women’s masters kumite.