I did indeed hijack my TUG username from a character in 'Around The World In 80 Days' (1956), the manservant who accompanied Phineas Fogg on his journey. I thought it fitting as one who accompanies my DW on our travels.
French for 'goes everywhere', generically, a passepartout is a skeleton key that opens any lock or the French term for the mat, usually cardboard, that both serves to frame a piece of art in a frame and to hold the art from contact with the glass of a picture frame.
Jim Ricks