I love how this nerd has just been double-crossed, is facing inconvenient discorporation
and the threat of paperwork!and he’s more worried about the fact that Crowley has changed/added to his name againAlso
With similar priorities, Crowley is more worried that Aziraphale might not like his name than the fact that 1) he’s on consecrated ground, 2) there’s a gun pointed at them, and 3) he knows a bomb is about to be dropped on their heads
And still in the middle of this situation, Aziraphale rushes to assure him that that’s not what he said! He’ll get used to it!
Don’t worry, my dear, I was just surprised! I hadn’t heard that you changed your name!