Originally the main character was going to be Tinny, the title character in Tin Toy. He would have gotten lost during a family trip and joined up with a sarcastic ventriloquist dummy in a search for a home. Eventually, Tinny was replaced with a toy astronaut named Lunar Larry, which then became Buzz Lightyear. The dummy, meanwhile, was given the identity of a cowboy, eventually becoming Woody.
Toy Story TOMS!!