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: of uncertain derivation. It may be an occupational name for a judge, Middle Low German domer, an agent derivative of domen ‘to judge or pass sentence’. Alternatively it could a nickname for a self-indulgent person, Middle Low German domer.