I just found an ancistor with the given name Collman (in an Austrian (German speaking) register:
https://data.matricula-online.eu/de/oesterreich/graz-seckau/st-kathrein-am-offenegg/7084/?pg=56 ;on the right side, page 109 4th listing, october 22nd 1720: child: Elisabetha, parentes: COLLMAN Schattleither (father) etc.) It is very rare in German speaking countries.