Dictionary of Medieval Names
from European Sources

Reinwise f. Proto-Germanic *ragin 'counsel, might' + Old Saxon widu, wido, Old High German witu 'wood'.

France
Latin
c823 Ragnois (nom) irminon-vol2 16, Palatiolum
Italy
Latin
1034 Ranuise skinner p. 115
Cite as: J. Uckelman, S.L. Uckelman. "Reinwise". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Reinwise.