Melchior

It's also the French form as well.
https://nominis.cef.fr/contenus/prenom/4740/Melchior.html
https://it.m.wikipedia.org/wiki/Melchiorre
https://namesfolder.com/french-boy-name/melchior [noted -ed]

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://sursassiala.ch/2015/01/15/familienforschung/
https://www.portraitarchiv.ch/portrait?page=145
http://www.annalas.ch/persunas/display/q:Melchior

Also Hungarian: https://hu.wikipedia.org/wiki/Melchior

Also Hungarian.

Also used in Poland, where it's pronounced "mel-hyor".

This name was common among the Schwenkfelder religious community which moved from Silesia to America in the early 18th century. It appears approximately a dozen times in the passenger logs of the ships which brought the immigrants over, and among the first few generations born in America as well.