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Dictionary of Medieval Names
from European Sources

Alfdag m. Old High German alb 'elf' + Old Saxon, Old Dutch dag, Old High German tag 'day'.

Germany
Latin
822x875 Alfdagus (nom) TradCorb §40; 963x1023 Alfdag (nom) ibid. §228
Cite as: S.L. Uckelman. "Alfdag". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 2. http://dmnes.org/2016/2/name/Alfdag.