Danish equivalent of Katherine. It was first introduced to the English-speaking world by Scandinavian settlers in America; it has been used in Britain only since the 1940s, but had become very popular by the 1960s.
German: 1. from a Germanic personal name formed with a cognate of Gothic hrōtheigs ‘victorious’. 2. variant of Grob. 3. from Gropp ‘grouper’ (the fish); possibly a metonymic occupational name for a fisherman, or a nickname for someone with a large head and wide mouth like a grouper.