Frostpaw tribe

The Frostpaw tribe is a tribe of polar furbolgs located in the Grizzly Hills of Northrend. For thousands of years, these furbolgs have lived in peace within the city of Grizzlemaw with the other furbolg tribes, until corruption spread among them. Now driven with madness, they wage war with the Redfang tribe to seek control of Grizzlemaw.

In the RPG
A few stories claim Grizzlemaw was built on the site of the Frost Paw tribe's lodge and was made large enough to accommodate several furbolg tribes at once. The Frost Paw then invited other friendly tribes to shelter the winter with them. The resulting ties changed the furbolgs from scattered hunters to a stronger, more unified race, and the Grizzly Hills from ancestral hunting grounds to a loosely defined nation. Supposedly, the Frost Paws gathered the tribes together in part to fend off the Drakkari threat.