I don’t know if they are or if they aren’t, but I took this snap in Paris at the famous Cathedral of Notre-Dame, and they have circles around their heads, so it is not unreasonable to think this:
As you can see, the second one from the right (oddly) sports no beard. Could this perhaps really be Mary Magdelena? After all, this figure is carrying a chalice . . .
Another mystery for me to clear up one day!