The name was never uttered on-screen (except possibly in one of the animated series) and there’s a new Boba Fett TV show coming, so I suspect that something about the ship’s name will be canonized there that will retcon its former moniker.
I personally have no dog in this fight. It’s not a great name for a ship anyway.
Starwars.com is the official canonical reference source for the Star Wars universe and it has info on Slave 1, including an article about its conception, and it still has the name in its entry.
The ship itself appeared multiple times in the Clone Wars TV show but I haven’t had a chance to go through those episodes to see if its name was mentioned. If it was, I would think it was the episode where the pirate Hondo got his hands on it.
Also this. Lego Poe Dameron’s ship is called “Poe’s X-Wing Fighter,” Lego General Grevious’s ship is called “General Grevious’s Starfighter.” They get generic names to cast a wider net when parents are shopping. A buyer might not know what Slave I is but they might know “Boba Fett’s Ship.”
Yes, Slave I appeared starting in the first episode in which Boba and Fennec Shand are shown to be working together. The Razor Crest is destroyed, and Mando hitches a ride with Boba and Fennec. The name wasn’t mentioned.
I haven’t watched the show (I may need to turn in my Geek badge) but Slave 1 is clearly a singleship, designed for one pilot/occupant and storage space for compact, high value cargo. How do you fit two other people into that?
Yep. When it first appears in The Empire Strikes Back, it’s pretty clearly a small ship, not much bigger than a Y-Wing or large “snub fighter”. It’s since been retconned into being a considerably bigger ship, with substantial interior space.
And I don’t think I’ve ever seen anyone getting upset about that sort of retconning.
And what about Wookie claws? Wookies don’t have claws. Except then they do, for climbing. But, no, wait, they’re actually also usable in combat. But, no, wait, Wookies have very strong cultural and psychological inhibitions against using them that way, and only insane outcasts would ever use them in combat. But, no, wait, “rageclaws” are a totally normal, playable character build. But, no, wait, we finally see an actual Wookie hand on-screen in The Last Jedi, and…it’s just a perfectly normal human hand, with a big tuft of fur on the back. No claws at all.
The overly-elaborate point being, Star Wars has always retconned elements of the story. Dropping references to Slave I bothers me a lot less than who shot first, Han or Greedo.