Answer: Those are not their real names (Patreon)

Parfait's real name is Mayra, Pudding's real name is Caroline, Bonbon's name is Abigail.
The dessert names are more of an alias that the girls decided to use, to make them stand out from the rest, basically.
But this is a great opportunity to show off the parents of the girls , who are not, in fact, dessert lovers.