Unferth

Unferth is the human pet of Bob the Jagex Cat. He starts A Tail of Two Cats quest, in which you are asked to make him a chocolate cake (the recipe of which can be found in his bookcase), bring him a bucket of milk and harvest his potatoes.

Unferth's name might have had influence from Unferth, a thegn of the Danish lord Hroðgar in the poem Beowulf.