Maybe someday they'll actually make a movie on Buddha from the actual scriptures.
You can tell how knowledgeable someone is when he writes, "The Great teacher Gautam, whom people affectionately call the Buddha". (Page 1 Old Path, White clouds)
Er, in the Ariyapariyesana Sutta:, he tells the 4 disciples to not call him by his old name,Gautam, because he is now the Tathagatha.
'Don't address the Tathagata by name and as "friend." The Tathagata, friends, is a worthy one, rightly self-awakened. Lend ear, friends: the Deathless has been attained. I will instruct you. I will teach you the Dhamma. Practicing as instructed, you will in no long time reach & remain in the supreme goal of the holy life for which clansmen rightly go forth from home into homelessness, knowing & realizing it for yourselves in the here & now.'
No disrespect, but this Venerable studies too little.