How Oscar get it's name?

I know that there is Oscar fever everywhere, but do you know Oscar get its name? There are a few stories as to how the Academy Award statuette came to be called Oscar:

Margaret Herrick, the librarian and executive director of the Academy of Motion Picture Arts and Sciences, said that the statuette reminded her of her Uncle Oscar.

Bette Davis claimed she noted aloud the resemblance of Oscar's backside to that of her husband, Harmon Oscar Nelson.

The first documented mention of the name was in 1934, when columnist Sidney Skolsky referred to Katharine Hepburn's first Best Actress Oscar. He says he was tired of writing "the Golden Statue of the Academy," and fell back on the name Oscar from an old vaudeville joke he had heard.