Regin

Old Germanic form of REIN.

REIN   male   German, Frisian, Dutch
Originally a short form of Germanic names beginning with the element ragin "advice, counsel".
EQUIVALENTS
DUTCH: Rein, Rien
FRISIAN: Rein
GERMAN: Rein
FEMININE FORMS
ANCIENT SCANDINAVIAN: Ragna
DANISH: Ragna
ICELANDIC: Ragna
NORWEGIAN: Ragna
SWEDISH: Ragna