" IMDb lists Johnny as Jonathon Lance Whitworth, does he ever go by Jonathon? It's my favourite name (: "
In Hollywood, no. In his personal life, I couldn't tell you but I doubt it. In my opinion, "Johnny" is an integral part of his brand and persona, just like it is for Johnny Depp. But who knows, maybe someone calls him Jonathon. I just call him sexy. woot.