In early American editions of the book, Lewis changed the name to Fenris Ulf (a reference to Fenrisúlfr, a wolf from Norse mythology),[1][2][3] but when HarperCollins took over the books they took out Lewis' revisions,[4] and the name Maugrim has been used in all editions since 1994.

Nikabrik in Prince Caspian indicates that Narnian wolves have no loyalty to the lion Aslan.

Maugrim is subsequently described as "a huge grey beast – its eyes flaming – far too big to be a dog".

Aslan's creatures then follow Maugrim's subordinate wolf to the White Witch, enabling them to rescue Edmund.

When informed about Maugrim's death, the White Witch sends the same wolf to rally her army so that they can meet her at her current position as speedily as they can.