Nominal for Storing, Structural for Manipulating

Consider two functions, say copySurname and copyStreetName. They do same exact thing, but in different context. No sane person would call copySurname for the street, even though the function is the same.

So there is this tension, should name of the function (or of the type) only reflect it's internal structure (structuralism), or should it also reflect the intended domain application (nominalism)?

There is a formalism school of mathematics that is pretty much the hardcore structuralist, i.e. names of the objects don't matter, only their relationships. But most mathematicians (and all programmers) reject that view.