[Quetscher]

I see what you mean, Alan. All these instruments are constructed in slightly different ways, some like “classical” melodicas (melodion, pianica, melodyhorn), some like accordions (Eolina, Vibrandoneon), some in still another way (accordina). Nevertheless there are three things that define them as belonging to the same instrument family: they have free reeds, they are mouth blown and the have keys or buttons. And that’s why I still would prefer to call them all melodicas (although I have to admit that your suggestion “keyboard mouth organ” hits the three definition items quite exactly)