Mine is an old gamertag. (I love online games)
gilth is derived from Gilthoniel,
wich is from "a Elbereth Gilthoniel"
from an elven verse in the Lord of The Rings by Tolkien.
Yep, I love fantasy books.
Mine is from Lord of the Rings as well.
Underhill is from the first movie,when Froto and the gang went to the Inn.He was asked his name and he gave Underhill as an alias.