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Dictionary of Medieval Names
from European Sources

Regulus m. Latin regulus 'petty king, prince', a dim. of Latin rex 'king'.

The name of a 4th C legendary Greek saint and an early Italian saint.

France
Latin
1378 Reguli (gen) hanquetvol1 515
Cite as: S.L. Uckelman. "Regulus". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2015, no. 2. http://dmnes.org/2015/2/name/Regulus.