E. Rossoni and F. De Laurentiis agree that Bellettati is a patronymic surname typical of northern Italy, especially in the Emilia-Romagna area bordering Veneto. According to Rossoni, the suffix -ati carries the meaning of “son of” or “descendant of”, indicating a family descended from an ancestor whose father bore the medieval name Bellettus. This type of surname formation was common in the Middle Ages and served to identify members of the same lineage.

F. De Laurentiis further connects Bellettati with the broader family of surnames related to Belli, deriving from the root bell- (“beautiful”, “handsome”). This supports an origin in personal names or nicknames that emphasized positive physical or personal qualities, a widespread practice in medieval Italian naming traditions.

De Laurentiis also proposes a possible dialectal connection with the Venetian term sbellettà, used to describe someone who takes particular care with their appearance, dresses elegantly, or “makes oneself look handsome.” Although secondary to the patronymic explanation, this interpretation reinforces the association of the surname with notions of attractiveness, refinement, or social presentation.

Overall, the available evidence points to Bellettati as a patronymic surname derived from a medieval personal name, while preserving possible descriptive connotations linked to beauty, elegance, or outward appearance.