Offizierstellvertreter Fritz Gustav August Kosmahl HOH, IC (5 September 1892—26 September 1917) was one of the first flying aces of Germany's Luftstreitkräfte during World War I. He was one of the few German two-seater aces of the war, being officially credited with nine aerial victories. He was also one of the first ten German aviators to earn the Royal House Order of Hohenzollern.