Joby

"Joby, to the stables."

- Lord Commander Jeor Mormont

Joby is an unidentified background character in the first season. He is a newly made Steward of the Night's Watch, of the same group of recruits as Jon Snow.

Season 1
Joby is present during the speech Lord Commander Jeor Mormont gave to the "graduating" recruits. Joby is assigned to the stables.

In the books
In the A Song of Ice and Fire novels, there's no member of the Night's Watch called Joby.