Rein as a Baby Name. Meaning and Origin of Rein

What is the meaning of the name Rein ?

The baby name Rein is a Male name , 1 syllables long and is pronounced English: /reɪn/ (rayn),German/Dutch/Norwegian: /raɪn/ (rine),Japanese (transcription): /ɾein/ (approx. 'rein').

Rein is Dutch, Germanic, Scandinavian in Origin.

Rein is a Dutch and Estonian masculine name, usually a short form of Germanic compounds such as Reinier, Reinhard, and Reinhold. These derive from Proto‑Germanic ragin ‘counsel, decision’ joined with elements like hari ‘army,’ hard ‘brave,’ or wald ‘rule,’ yielding senses from ‘counsel of the army’ to ‘brave by counsel.’ As a standalone, Rein is often glossed ‘wise counsel.’ German rein ‘pure’ is a later folk link; in Norwegian rein also means ‘pure,’ giving a modern secondary association.

Attested across the medieval Low Countries and German‑speaking regions through forms like Rainer, Rainier, and Reinier, the name appears with figures such as Saint Rainier of Pisa. Rein became well established in Estonia in the 20th century and remains in quiet use in the Netherlands and Scandinavia. Related and variant forms include Rainer, Rainier, Reiner, Reinier, Rayner, Ranieri/Raniero; Dutch spellings Reyn/Reijn; diminutives Reini/Reiny; note the unrelated Spanish Reina.