- Bruce, David Bruce, Sir David Bruce - Australian physician and bacteriologist who described the bacterium that causes undulant fever or brucellosis (1855-1931)
--1 is a kind of doctor, doc, physician, MD, Dr., medico; bacteriologist
- Bruce, Robert the Bruce, Robert I - King of Scotland from 1306 to 1329; defeated the English army under Edward II at Bannockburn and gained recognition of Scottish independence (1274-1329)
--2 is a kind of king, male monarch