Ash Legion

The Guild Wars 2 Wiki has an article on Ash Legion.

The Ash Legion is one of the four High Legions of the charr. The Ash Legion is famed for its stalkers and Assassins. Known members of its primus warband include Ghast Ashpyre and Rox Ashreign. It is not known whether War Ashenskull belonged to the Ash warband or the hypothetical Ashen warband, as charr surnames generally use the warband's name as a prefix.