Mandalay, are there any other derivatives for your name?

Yes, I think so.

The name is Mandaly.  But people have called me Mandalay ☺, Mandly, Mandalie, Mandarine, Magdalie, Magalie, Magdalène, Mangdalie, Mandy, Manda, Daly, and even Dada.  Now, you have to know that this last one, Dada, is a Haitian Creole nickname for buttocks :).