Kálmán is an ancient Germanic origin Hungarian surname and male given name. Outside Hungary, the name occurs sometimes in the form Kalman. It was derived from the Germanic name: Koloman, Coloman or Kolman. The Germanic name Coloman has been used by Germans since the 9th century. Kalman (קלמן in Yiddish and Hebrew, occasionally spelled Calman in Roman letters) is also a Yiddish given name that is a short form of the Greco-Jewish name Kalonymos (קלונימוס, meaning "beautiful name", a reference to a miracle worked in God's name).
https://en.wikipedia.org/wiki/K%C3%A1lm%C3%A1n