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Dictionary of Medieval Names
from European Sources

Frotbald m. Old Frisian, Old Saxon frōd, Old High German fruot 'wise' + Old High German bald 'bold'.

France
Latin
c823 Frotboldus (nom) irminon-vol2 97b, Palatiolum
Cite as: S.L. Uckelman. "Frotbald". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 3. http://dmnes.org/2016/3/name/Frotbald.