Riina

Riina is a Finnish and Estonian feminine name that developed as a short form of names ending in the element -riina, itself derived from Katariina, the Finnish and Estonian form of Katherine. Katherine traces back to the Greek name Aikaterine, whose precise root is debated but has long been associated with the Greek word katharos, meaning pure. Riina functions as an independent given name throughout Finland and Estonia while remaining closely tied to its longer source forms, including Katariina and Mariina.