Name Longoni Type Surname (from location & from nickname) Usage Italian Pronounced Pron. [loŋ.ˈɡoː.ni] Other Forms FormsLongon, Longone Edit Status Status3. usages AND description are verified Meaning & History Probably a variant of Longo "long, tall" using the augmentative suffix -one. In some cases, it could instead derive from the toponym Longone.