Nicknames

This is a small thing, but I have a pair of twins right now named Danissa and Dalyssa, but I consider them to usually go by Danny and Dolly. But I realized there's no way to indicate that in game--in order for one name to be in the game, the other has to be deleted. I don't want to delete their fully names, but I kinda wish there was a way to denote a "friendly" or "familiar" name. I realize this is super low priority, it's certainly not a problem that needs to be fixed exactly, just a thought I had.