Dictionary of Medieval Names
from European Sources

Willo m. Old High German willo 'will', or a pet form of any of various names beginning with this element.

Austria
Latin
1124 Willinc (nom) UrkStyria 110
Estonia
Middle Low German
1428 Wyllyngh BbRT p. 353
France
Latin
c823 Willonus (nom) irminon-vol2 86, Ved; 1121 Guilenci (gen) clairvaux-12thc 1; 1125x1136 Guilenci (gen) CartYonne1 CXXXIX, Guilencus (nom) ibid. CXXXIX; 1131 Wilenco (abl) clairvaux-12thc 4; 1135 Wilenci (gen) ibid. 7, Wilenco (abl) ibid. 7, Wilencus (nom) ibid. 7; 1147 Wilenci (gen) ibid. 15, Wilenco (abl) ibid. 17, Wilencus (nom) ibid. 18; 1147x1162 Wilencus (nom) ibid. 52, Willencus (nom) ibid. 52; 1155 Wilenchi (gen) ibid. 30; 1159 Wilenchi (gen) ibid. 36, Wilencus (nom) ibid. 36; 1163 Wilenco (abl) ibid. 99; 1163–64 Vilencus (nom) ibid. 106; 1164 Vilencus (nom) ibid. 120; 1172 Guilenchi (gen) ibid. 150; 1219 Villenc (nom) CartAub
Middle French
1386 Guillo MemBret-II col. 513
Germany
Latin
963x1023 Willo (nom) TradCorb §226; 987 Willo (nom) HambUrk-vol1 XLVIII
Switzerland
Latin
1163 Willincus (nom) CartHaut 13
Cite as: G. Grim, S.L. Uckelman. "Willo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Willo.