...“คณปติ” (Ganapathi : lord of the ganas)... ???

Did you mean 'gaṅapati'?

From 'gaṅa' (or in Velthius convention- ga.na = คณะ, clan, group) and 'pati' ( = lord, master); together 'gaṅapati' = master of clan' or 'grand chief'.

I can't find reference to a Hindu tribe 'ganas'. Please advise.