Shaggydog

Shaggydog is one of five direwolf cubs that is found by the children of House Stark. Shaggydog is adopted and raised by Rickon Stark, the youngest of the five Stark children.

In the books
In the Song of Ice and Fire novels Shaggydog is the fiercest and least-disciplined of the five wolves, reflecting Rickon's willful nature. Bran thinks the wolf's name is stupid, and 'Shaggy' soon becomes a preferred name.