He legally changed it to Patrick when he was 18. His birth last name is no longer part of his life. He is legally a Patrick and everything related to his business and image is Patrick. It would be like Kim Kardashian changing her last name lol. I bet people would be okay with Loren Petermeyer, but it would be hard to re-brand something like that. Some of the branding is explained in the next chapter, so I don't really want to spoil it, not that it's a huge part of the chapter, but still.