Alexander "Sandy" Bonnyman, Jr. (May 2, 1910 – November 22, 1943) was a United States Marine Corps officer who was killed in action at Betio, Tarawa during World War II. A combat engineer, he received the Medal of Honor, Purple Heart, Presidential Unit Citation, Asiatic-Pacific Campaign Medal with three Bronze Stars and the World War II Victory Medal posthumously for his actions during the strategically important assault on a Japanese bombproof shelter during the Battle of Tarawa.