From A Wiki of Ice and Fire
The Hornfoot are a tribe of wildlings known in the south through tales. They wear nothing on their feet, which turns the soles of their feet hard.
The Hornfoot people warred with the Nightrunners before Mance Rayder negotiated a peace between them.
A Storm of Swords
The Hornfoot men joined with Mance Rayder for an attack on the Wall.
References and Notes