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Dictionary of Medieval Names
from European Sources

Ither m. Uncertain element + Old English here, Old High German heri 'host, army'. Morlet I:143a says the origin of the prototheme is obscure, but may be related to idh 'work' or idhja 'negotiate'.

France
Latin
c823 Itharius (nom) irminon-vol2 5, Palatiolum; 1135 Yterius (nom) clairvaux-12thc 7, Ytherus (nom) ibid. 7; 1138x1162 Iterius (nom) ibid. 56; 1147 Iterii (gen) ibid. 17, Iterio (abl) ibid. 17, Iterius (nom) ibid. 14; 1163 Iterio (abl) ibid. 99; 1163–64 Iterius (nom) ibid. 106; 1164 Iterius (nom) ibid. 120
Middle French
1418 Ydier HGParis p. 384
Preview. DO NOT cite as: J. Uckelman, S.L. Uckelman. "Ither". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 1. http://dmnes.org/2015/1/name/Ither.