Dictionary of Medieval Names
from European Sources

Leontius m. A derivative of Ancient Greek λέων 'lion'.

The name of 1st C saint, a 5th C Byzantine usurper, two 5th C French saints, a 5th C Armenian martyr and saint, and a 7th C Byzantine emperor.

France
Latin
c1030 Leoncius (nom) StVdM-II 714; 1030 Leontius (nom) ibid. 712
Italy
Latin
1376 Leoncino (abl) DouGen1 p. 87
Cite as: S.L. Uckelman. "Leontius". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Leontius.