Dictionary of Medieval Names
from European Sources

Reinwar f. Proto-Germanic *ragin 'counsel, might' + Old Saxon waru, Old High German wara 'protection, watch'.

France
Latin
957x91 Rainoara (nom) St-Bernard-Romans no. 109
Cite as: J. Uckelman, S.L. Uckelman. "Reinwar". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Reinwar.