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Dictionary of Medieval Names
from European Sources

Willulf m. Old High German willo 'will' + Old High German wolf, Gothic wulf 'wolf'.

Germany
Latin
855 Willulphus (nom) quix-vol1 3; 972 Wileillifus (nom) ibid. 15
Cite as: S.L. Uckelman. "Willulf". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Willulf.