Cathrin

Cathrin is a German short form of Katharina, which derives from the ancient Greek name Aikaterine. The deeper root of that Greek name is uncertain, though it has long been associated by folk etymology with the Greek word katharos, meaning pure, an association reinforced when the name was adopted by early Christians. The name was popularized across Europe through Saint Catherine of Alexandria, a revered early martyr. Related forms include Katrin, Kathrin, and Katherine.