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:

[![enter image description
here](https://i.stack.imgur.com/57Iy9.jpg)](https://i.stack.imgur.com/57Iy9.jpg)

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.

