Dictionary of Medieval Names
from European Sources

Hilaria f. Latin hilaria 'cheerful, lively, light-hearted'.

The name of an early saint and martyr.

Cf. also Eulalia; these two names shared many spellings in medieval England, and are thus often impossible to distinguish in some contexts.

England
Early Modern English
1588 Ellery DEmar-vol2 p. 16; 1598 Ellory ibid. p. 37
France
Latin
1147 Hylaria (abl) clairvaux-12thc 15
Old French
1313 Alaire Paris1313 p. 16
Cite as: S.L. Uckelman. "Hilaria". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2016, no. 4. http://dmnes.org/2016/4/name/Hilaria.