Wing Commander Ioannis Agorastos "John" Plagis, DSO, DFC and Bar (1919–1974) was a Southern Rhodesian flying ace in the Royal Air Force (RAF) during the Second World War (1939–45), most noted for his part in the defence of Malta during 1942. The son of Greek immigrants, he was the war's top-scoring Southern Rhodesian ace, and the highest-scoring ace of Greek origin, with 16 confirmed aerial victories, including 11 over Malta. He held a number of commands towards the end of the war and finished it as Southern Rhodesia's most decorated serviceman, having won the Distinguished Service Order and other medals.