The surname Aiuti and its variants —such as Aita— have an anthroponymic origin of auspicious character, linked to medieval names that expressed a positive wish. According to E. De Felice, it derives from the name Aiùto or Aìta, formed from the noun aiuto ("help, aid"), and used as a name of good omen. More frequently, however, it is an abbreviated (hypocoristic) form of compound names such as Bonaiuto or Bonaìta ("good help"), as well as of more complex forms such as Diotaiuti or Diolaiuti.

As for its diffusion, E. De Felice indicates that the surname is rare, with presence mainly in Tuscany (forms Aiuti) and in the Neapolitan area (forms Aita), which suggests differentiated regional developments.

For his part, E. Rossoni confirms this origin, noting that it can derive both from abbreviated forms of surnames such as Diolaiuti and from the medieval name Aiutus, documented in the 13th century in texts of the Augustinian fathers. He also adds a historical reference in Sicily, where in the 14th century Vincenzo Ajuto appears, a knight of the court of Frederick III of Sicily, which shows its use in noble contexts.

Taken together, both interpretations agree in pointing to an origin linked to medieval auspicious names, with the meaning of "help" or "aid", and an evolution that gave rise to various abbreviated and regional forms within Italy.