Quin is fine as a nn for
Quinton.
Queenie is over-ambitious.
Apart from
Quentin as an alternative for
Quinton, and
Quintus, I can't think of any other male names in English. There is a Muslim journalist here in South
Africa named Qaanitah
Hunter; she is the political editor for an Internet news channel. I've never heard her name spoken, so I don't know what the Q sounds like.