Frederic Adolph Hoefer (14 April 1850 – 7 October 1938) was a Dutch lieutenant-general, militaria collector and archivist. He trained at the Koninklijke Militaire Academie and is notable for founding the Legermuseum and restoring Doorwerth Castle.Hoefer was born in Sittard and was in the middle of a successful military career when a fall from his horse in 1880 forced him to take honorable leave from the service.