hello, thinking about it, my favorite movies are disney movies
So are mine! It used to be known as Buena Vista Distribution Company back then.
i never knew it used to be called Buena Vista Distribution Company 
Yeah, and the films produced before Peter Pan were distributed by RKO Radio Pictures.
i have heard of RKO before, so when did it change its name to Disney
It never changed it's name. Walt Disney took them over. They were one of the big five studios.
no i mean when did Disney changed its name to Disney
Disney was founded in 1923, they operated under Walt Disney Studio and then Walt Disney Productions.
so they always been know as "Disney" then
Yes they were always known as Disney. They are the second largest media conglomerate right after Comcast.