In the late 1990s, Toyota almost released a full-size truck called the T-150... if Ford hadn't protested, they would have

The F-150 was already a best-selling vehicle in America when Toyota proposed its new T-150, but Ford lobbied against the title. Ford successfully claimed the name met conditions for trademark infringement due to its similarity to the F-150, as the Los Angeles Times reported in 1998

 

So they named it the T100 instead

https://www.thedrive.com/news/the-toyota-tundra-was-nearly-called-the-t-150-until-someone-blocked-that-guess-who