Until it actually arrives, I call my R1S Godot.
In Samuel Beckett's play, Waiting for Godot, the two main characters spend the entire play waiting ... but Godot never shows.
Stoick. It's big, it's green... We have a blacked out Model S called Toothless (came first) then we had a little blue Model 3, named Hiccup... Stoick was just the next natural choice.
I asked an AI internet tool what I should name it, it suggested something related to nature or feature close to where I live. I live in Reno with the Truckee river flowing though it so I named the R1T "Truck-e".