>>29804965They already did. Sun/Moon, Elio/Selene.
These were all initially dismissed by us though because "pre-release names don't count" (which had some basis I guess) and we were all waiting for what names they would have in the final game, but since they don't appear as NPCs anywhere, it's back to those names, since those names are the only ones we have for them whatsoever.
This situation hasn't really happened since ""Leaf"" in FRLG, and Bulbapedo covered us on that one.