•
James MacDonnell (1884–1973), Canadian soldier, lawyer, and politician from Ontario •
James MacKerras Macdonnell (1884–1973), Canadian lawyer and parliamentarian from Ontario •
James Macdonnell (1781–1857), Scottish military officer; fought at the Battle of Waterloo •
James Smith McDonnell (1899–1980), American businessman and aviation pioneer; founder of McDonnell Aircraft, later McDonnell-Douglas • James McDonnell (born 1961), American musician better known as
Slim Jim Phantom •
Joe McDonnell (ice hockey) (born 1961), Canadian professional ice hockey player •
Joe McDonnell (rugby player) (born 1973), New Zealand rugby union player •
Joe McDonnell (hunger striker) (1951–1981), Irish member of the Provisional IRA; died in IRA hunger strike •
John McDonnell (businessman) (born 1938), American aviation businessman, son of James Smith McDonnell •
John McDonnell (coach) (1938–2021), Irish-American college football coach •
John McDonnell (footballer) (born 1965), Irish football manager •
John McDonnell (politician) (born 1951), British politician and MP •
Johnny McDonnell (fl. 1908–1912), Irish footballer ==K==