F. De Laurentiis notes that Raisi is a variant of the surname Raisa.

F. Miranda proposes an Arabic or Persian origin for this surname, linking it to the word rais, with the meaning of "chief" or "leader." He also mentions the existence of hypotheses about an Italian origin, possibly linked to a medieval name or a professional nickname. As a graphic variant he records Raise.

As to its geographic distribution, Miranda indicates that the surname is present in specific areas of Italy, with a greater representation in Veneto, Emilia-Romagna, Lombardy, Lazio and Piedmont, besides a smaller presence in Liguria, Trentino-Alto Adige and Sicily. In this last region, its presence is limited to the province of Enna, in the municipality of Regalbuto.