James "Jimmy" Graeffe was a Belgian hockey player. He played for the Belgian National Team at the World Championships in 1939, 1949, 1950, and 1951 (B Pool). Graeffe appeared in a total of 13 games at these tournaments and scored one goal. At the club level, Graeffe spent his entire career with Brussels Royal IHC. He also competed as a speedskater at the 1936 Winter Olympics.