How do u name ur twins???

Aerial
My husband and I keep trying to talk about when the boys are born, how do we figure out who gets what name. Baby A for Zander or baby B?? How do u sort out something like that? So I ask him well who ever comes out first Zander or Zayden? And he just looks at me with confusion. Help, how do u determine who gets there name, will I be waiting til last minute to decide? It's a very hard thing to figure out.