Köhler disease: rare, self-limiting, avascular necrosis (osteochondrosis) of the navicular bone in children. Described in 1908 by Alban Köhler (1874–1947)
Freiberg infraction: osteochondrosis of the metatarsal heads (typically the 2nd metatarsal head) described by Albert Freiberg in 1914, Alban Köhler in 1915