(Dutch.) A pure heart, from rein, pure.
Arthur, William (1857) An Etymological Dictionary of Family and Christian Names. New York: Sheldon, Blakeman. Public Domain.
REINHART
As described in historical dictionaries
An Etymological Dictionary of Family and Christian Names (1857)
(Dutch.) A pure heart, from rein, pure.
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English