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Dictionary of Medieval Names
from European Sources

Joly m. Middle English, Old French joli(f) 'merry, cheerful, cheerful'.

Some forms of this can also be forms of Julius, q.v.

England
Early Modern English
1532–1533 Jolye CovGuild-2 p. 118
Ireland
Latin
fin12thC Ioli (nom) MunDocIr III, p. 18
Cite as: S.L. Uckelman. "Joly". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2019, no. 1. http://dmnes.org/2019/1/name/Joly.