Rimhak Ree (Korean: 이임학; December 18, 1922 – January 9, 2005), alternatively Im-hak Ree, was a Korean Canadian mathematician. He contributed in the field of group theory, most notably with the concept of the Ree group in (Ree 1960, 1961).
Source: “Rimhak Ree”, English Wikipedia (CC BY-SA 4.0), excerpt