Most Jules's in the world grow up having their name made fun of when they are young, like "Hey Jules - like family jewels!" or "Jules? That's a girl's name! ...there's this chick Jules in my 'hood who gives good head."
But the male Jules who matures past the age of pre-pubescent name-calling eventually develops an empathy for people with odd names, and becomes adventurous, cultured, creative, and daring. They eventually attain a high level of respectability, and make excellent civic leaders, husbands, fathers, and bodyguards.
This carefully constructed personality allows them to associate equally with elitists and badasses, like Jules (played by Samuel L. Jackson), who serves as Mr. Wallace's henchman and thus himself is a badass in the Tarantino cult classic film, Pulp Fiction.