Meaning: a short form of Calixtus from Roman Callistus, the Greek form of Kallistos meaning “most beautiful”. The Callistus spelling was perhaps influenced by Latin calix meaning “wine cup”.
Calix is also a Catalan and Portuguese surname, perhaps deriving from Portugeuse cálice or Catalan càlic both meaning “communion cup”. In Catalan it could perhaps be derived from calitx, a type of throwing game.
Variants: Calixtus, Callistus