(Dutch.) A pure heart, from rein, pure.
Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
We don't have any stats on how common this name is. This is probably because it's very rare in the UK.
British Isles
England
English
Christian
English
Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.