First recorded in 1601. Shortened from names like Reinholds and Reinhards. Cognate with Estonian Rein.
Reinis m
- a male given name
- Klāvs Siliņš: Latviesu personvārdu vārdnīca. Riga "Zinātne" 1990, →ISBN
- [1] Population Register of Latvia: Reinis was the only given name of 2947 persons in Latvia on May 21st 2010.