This specific ice cream -- strawberry, vanilla, blueberry?
'Cause there are other three-color/three-flavor ice creams, and they all have different names: "neapolitan" is vanilla, chocolate, strawberry, and "spumoni" is cherry, pistachio and chocolate, for example.
Huh, it actually makes a lot more sense than the English name, since it's named after the guy who invented it. Americans named it after Naples, Italy because the colors originally resembled the Italian flag.