Where does middle C gets its name in music?

Middle C gets its name from its position on the keyboard.

It's called "middle" because it sits in the middle of the keyboard, both vertically (between the lower and upper octaves) and horizontally (between the black keys on the left and the black keys on the right).

This position is significant because it's the central note in a standard piano keyboard, giving it a point of reference for musicians to understand the other notes around it.