(urth) Chris' last name *Pirate freedom*

[Duncan Truter]

Hi. Does anyone have any idea what Chris' last name is? He mentions it
but never says what it is.

*spoiler*


*spoiler*

It couldn't be Columbus, could it? Nobody really knows where Columbus
came from, so I suppose it's a possibility especially since time
travel is involved, and Columbus was around 35 when he first became
known which gives him 7-8 years in Cuba to raise his younger self
properly (wikipedia link:
http://en.wikipedia.org/wiki/Origin_theories_of_Christopher_Columbus)

has anyone got any devastating counter-evidence? I'm pretty sure I'm
about to be embarrassed.

Duncan