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Dictionary of Medieval Names
from European Sources

Everbern m. Old High German ebur 'boar' + Old High German, Old Saxon bero 'bear'.

Estonia
Middle Low German
1408 Euerbern BbRT p. 345
Cite as: S.L. Uckelman. "Everbern". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Everbern.