Spelling variations include: Allegri, Allegro, Allegra, Allegretti, Allegretto, Allegretta, Allegrini, Allegrucci, Allegroni, Allegrani, Allegranza, Allegranzini, Allegrezza, Allegria, Alegri, Alegro and many more.
First found in Florence, originally the capital of Tuscany, then capital of the kingdom of Italy. On the River Arno there are numerous Florentine Churches, Museums, Galleries. It dates back to 313 A.D.
Some of the first settlers of this name or some of its variants were: Many settlers were recorded from the end of the 19th century in the great migration from Italy to the New World. Migrants settled in the eastern seaboard principally in New York, New Jersey, and Pennsylvania.