So, "Housen" is the Japanese way of writing his courtesy name, "Fengxian." So it really should be "Lu Bu Fengxian." I can only assume the raws wrote Lu Bu directly, but then his courtesy name in Japanese as Housen.
me: this comic is bright and shiny, will probably be a nice cute treat!
this comic: Her mother killed herself, she's going to be hunted by an incest cult, the godly emperor is terrified he can't do anything about it. ...Did we mention the plague?