Why is Elizabeth's last name "Greenhough-Smith"? Elizabeth Greenhough-Smith is the daughter of Julian Smith (i.e. Loser) and Sophia Tyler. 

Who is "Greenhough", and why does Elizabeth have her name, rather than, say, her mother's?
His full name isn't Julian Smith, it's Julian Tyler Smith, so I assume Greenhough is Sophia's maiden name.

His name tag reveals that he has Tyler on his name:



I'm pretty sure his name was shown as "Julian Tyler Smith" at some point on either the manga or anime, but I can't remember when.