Dictionary of Medieval Names
from European Sources

Reinger m. Proto-Germanic *ragin 'counsel, might' + Old High German, Old Saxon gēr 'spear'.

Belgium
Latin
1050 Reingerus (nom) CRS-2-5 p. 232
France
Latin
1131 Raingeri (gen) clairvaux-12thc 4; 1135 Raingerus (nom) ibid. 7; 1147 Raengerii (gen) ibid. 18, Raengerius (nom) ibid. 18, Raingerii (gen) ibid. 15; 1155 Raingerii (gen) ibid. 30; 1163 Raingerii (gen) ibid. 99
Germany
Latin
963x1023 Rainger (nom) TradCorb §227
Cite as: S.L. Uckelman. "Reinger". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Reinger.