Kaja

Kaja is a Scandinavian and Slavic feminine name with multiple independent origins. In Norwegian, Danish, and Swedish, it functions as a pet form of Katarina, itself derived from the Greek Aikaterine, a name of debated origin possibly connected to the Greek word katharos, meaning pure. In Polish and Slovene contexts it is similarly used as a short form of Katarzyna or similar Katarina-type names, while in Estonian it exists as an independent name. Related forms include Katarina, Katarzyna, and the Czech variant Kája.