I hope this is seen by a calypsonian or someone from the West Indies familiar with calypso:

I have several older songs in which the name of the girl is Dorothy or Miss Dorothy. Is (was) this local slang for a girl generically, or perhaps a convention to denote 'the other woman' or perhaps a woman of [delicately, John] easy virtue? Or maybe the syllables of the name just fit well.

TIA-John