Kaisa

Kaisa is a Finnish and Estonian feminine name that developed as a vernacular short form of Katariina, the regional adaptation of Katherine. Katherine itself traces back to the Greek name Aikaterine, whose exact root is debated but is commonly associated with the Greek word katharos, meaning pure. Kaisa has been a popular given name in Finland for centuries and remains in regular use today. Related forms include Kaarina, Katri, and Katariina, as well as the international variants Katherine and Catherine.