Maybe we should just go to numbers instead
I always liked Boeing's strategy: 707, 727, 737, etc...which leaves you to wonder:
1) Where did the impetus come from to name the "707" in the first place?
2) Why did they skip "717?" (Yes, I know that, eventually, they made a DC-9 derivative the 717, but for a long time, there was none.)
Also, Ford's truck strategy was 1,2,3... and then they switched that logical progression up into 100, 200, 300. (I think it was around the time the "F-100 Super Sabre" was all the rage as the USAF began its "century series" fighters, but don't hold me to that!)