Bint means daughter/girl in Arabic, and in certain grammatical constructions means daughter of ....
Have never heard it used in English though so I can not vouch for it's appropriateness. As for the story itself, it made me smile. I think Hoity is still sufficiently in character his disregard for status does fit in with the "respected artist" archetype. Gilda, Trixie, Derpy and Luna; is that a reference to that comic strip of them sitting in Celestia's basement plotting her downfall?