Dictionary of Medieval Names
from European Sources

Allegro m. Latin alacer 'lively, cheerful, happy'.

Italy
Latin
1464 Alegrus (nom) CUP-III-I CCXXXI
1450 Allegrinus (nom) VitAs2 VIII
Cite as: S.L. Uckelman. "Allegro". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2017, no. 1. http://dmnes.org/2017/1/name/Allegro.