Where did buster keaton get his name?

Answer 1

When 'Buster' was 18 months, he fell down a flight of stairs.

When reaching the bottom, he showed no sign of pain and Harry Houdini who was over at the time, remarked 'What a buster!'

And so the name stuck

Answer 2

Buster Keaton's real name was Joseph Frank Keaton.

Answer 3

Buster Keaton went by The Great Stone Face, and Malec.