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.

France
Latin
c823 Willonus (nom) irminon-vol2 86, Ved
Germany
Latin
963x1023 Willo (nom) TradCorb §226; 987 Willo (nom) HambUrk-vol1 XLVIII
Cite as: S.L. Uckelman. "Willo". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Willo.