The name should also advertise the "vibes" you want to put out. For example, and given that there are 5 of you, you could have:

Fist (show dynamism)
A Fistful Of Notes (AFON for short - tongue in cheek name)
Pentatonic (could be joked over as "catatonic")
Pentogram (harmonic connotations)
Five's A Crowd

etc etc