From the Old Norse personal name Rögnvaldr (composed of regin ‘advice, decision’ (also, ‘the gods’) + valdr ‘ruler’). This name was regularly used in the Middle Ages in northern England and Scotland, where Scandinavian influence was strong. It is now widespread throughout the English-speaking world.
Respelling of a Scandinavian and North German patronymic derived from the Old Norse personal name Eiríkr, which is composed of ei ‘ever’, ‘always’ (or a reduced form of ein ‘one’, ‘only’) + rík ‘power’. The main forms are Erichsen, Eriksen, Ericsson, and Eriksson.