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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'.

Belgium
Middle Dutch
1377 Ydier (nom) RSG1376-89 p. 77, Ydiere (dat) ibid. p. 78
France
Latin
c823 Itharius (nom) irminon-vol2 5, Palatiolum; 1135 Yterius (nom) clairvaux-12thc 7, Ytherus (nom) ibid. 7; 1138x1162 Iterius (nom) ibid. 56; 1139 Iterius (nom) HAP p. 372; 1143 Iterius (nom) ibid. p. 373; 1147 Iterii (gen) clairvaux-12thc 17, Iterio (abl) ibid. 17, Iterius (nom) ibid. 14; c1150 Yterius (nom) CartSavII 200; 1163 Iterio (abl) clairvaux-12thc 99; 1163–64 Iterius (nom) ibid. 106; 1164 Iterius (nom) ibid. 120; 1179 Iterius (nom) ibid. 177, Iterus (nom) ibid. 178, Yterii (gen) ibid. 176, Yterus (nom) ibid. 176
Middle French
1418 Ydier HGParis p. 384; 1421 Ithier HAP p. 399
Cite as: J. Uckelman, S.L. Uckelman. "Ither". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Ither.