Vibra-, idio-, membrano-, aero-, etc. are existing or obvious prefixes. Sax- is not. All I can think of is Saxon, but saxophones are pretty recent, so that do

Vibra-, idio-, membrano-, aero-, etc. are existing or obvious prefixes. Sax- is not. All I can think of is Saxon, but saxophones are pretty recent, so that doesn't match. Sousaphone is another -phone that's pretty obviously named after a person. Less well known but still pretty obvious are rothphone, heckelphone, sarrusophone, sudrophone.