Wonderful, Kallistos - thank you for checking!

I'm just sharing a theory - that Hammond (who is, after all, a very respected Alexander scholar) feels that Phillip's changing Cleopatra's name to his mother's name before he married her is yet another implication of evidence that he planned to oust Olympias, or make this marriage more humiliating for her. Hammond even posits that, possibly, Phillip was planning to make Euridice the Numero Uno Wife and give her stature in the harem (he had seven wives, after all!) that would compete with Olympias' stature as "mother of the heir."

Unprovable - but interesting! I find it even MORE interesting that most scholars apparently use Euridice more than Cleopatra! Or could that simply be convenience, so as not to confuse Phillip's child-bride with Alexander's full sister?