This page is historical. Follow this link for the current version.
Dictionary of Medieval Names
from European Sources

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

Italy
Latin
1367 Allegri (gen) Livi 118; 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 2019, no. 1. http://dmnes.org/2019/1/name/Allegro.