Please tell us your name.
A name typically consists of a first and a last name.
Some people also have a middle name. Or more than one.
Because of that, we offer a single input here, instead of one for each kind of name.
Some cultures even have habits of naming that are very different to ours, so it's really hard (if not impossible) to define a offer an input mask that's working for all. This is another reason why having a single input works fine here.