Oberstleutnant
/ˌəʊbəstˈlɔɪtnənt/Military
noun
In Germany, Austria, and Switzerland: a military title or rank equivalent to a British or U.S. lieutenant colonel and (in the air force) to a Royal Air Force wing commander; a person of this rank.
Origin
Late 19th century; earliest use found in Harper's Magazine. From German Oberstleutnant from Oberst colonel + Leutnant second lieutenant.