Oxford English Dictionary
According to Tony Ring (Wodehouse Society), Jeeves is also "a generic term in the Oxford English Dictionary". Sadly, the date of inclusion isn't mentionned. Someone with access to OED.com could add a great reference to the article.
In the books, Jeeves insists he is NOT a butler, he is a "Gentleman's Gentleman". I am not sure if that should affect this entry or not. --Stooshie 10:13, 14 October 2008 (UTC)