Also Romansh. Source: "Vornamen in der Schweiz. Prénoms en Suisse. I nomi in Svizzera. Prenoms in Svizra" (1993) published by the Association of Swiss registrars Https://rm.wikipedia.org/wiki/Gion_Caspar_Collenberg Https://rm.wikipedia.org/wiki/Caspar_Decurtins Https://www.portraitarchiv.ch/portrait?page=56 Http://www.annalas.ch/persunas/display/q:Caspar
https://www.beliebte-vornamen.de/10027-kaspar.htm
https://en.m.wiktionary.org/wiki/Caspar#German
https://de.m.wikipedia.org/wiki/Heilige_Drei_K%C3%B6nige - "Caspar, Melchior und Balthasar", referring to the magus