What is in a name?
A steeldrum is used to make a steelpan.
A name is a label for a thing to distinguish it from another thing. By using the wrong name one might be misled as to what the thing is, until it is either being seen or described.
Many people still call steelpans bongos, bongo drums, steeldrums, tin lids, tin cans or bin lids. These names may be referred to as colloquial names for steelpans by non-pannists, whereas pan is the term used by pannists.
A classical violinist is not referred to as a fiddle player.
The steelpan may have evolved from the bongo drum, but it is a steelpan.
In the same way humans may have evolved from apes, but are humans.