Where Does the Benedetto Surname Come From?
A coat of arms belongs to a particular family line rather than to everyone named Benedetto, so the heraldry linked to Benedetti is a starting point, not an automatic right.
Family name meaning
Benedetto is how some branches of the Benedetti family came to write their name. It grew out of a personal name: “Of Benedetto ("blessed")”.
How the spelling arose
The change of ending between Benedetti and Benedetto reflects the Italian habit of naming a family in the plural or the singular. The same family of names includes Bendetti and Benedettini.
Want more than a summary? See the Benedetto family name pack.