@Ulfhednar The literal is "Viruto" or "Wiruto". Japanese Wikipedia claims it is Wirth, Wild, or Wildt, with the most common being the first. Google is the same.
https://ja.wikipedia.org/wiki/%E3%83%B4%E3%82%A3%E3%83%AB%E3%83%88
You're free to offer a better suggestion, but I always go by most...