House Blackmont

House Blackmont is a vassal house which holds fealty to House Martell of Dorne.

House Royce's sigil is a black broken wheel on green.

In the books
In the A Song of Ice and Fire novels, House Blackmont's castle-seat (also named Blackmont) is located in the far west of Dorne, in the Red Mountains. It is further up the Torentine River from Starfall (seat of House Dayne), which is located closer to the river's mouth.

As a result, the Blackmonts have very little Rhoynar ancestry, as the Rhoynar primarily settled in the eastern river-valleys of Dorne. The noble Houses from the Red Mountains descend primarily from the same First Men/Andal ethnic mix as most of the rest of southern Westeros, and thus tend to be light-haired and light-skinned, compared with the coastal Houses that descend primarily from the Rhoynar (such as the Martells), who are much darker-skinned. The dark-skinned coastal Dornishmen descended mostly from the Rhoynar are known as "salty Dornishmen", while the light-skinned First Men/Andal descended Houses of the western mountains are known as "Stony Dornishmen".

The members of House Blackmont at the time of the novels are:
 * Lady Larra Blackmont, Lady of Blackmont.
 * Jynessa Blackmont, her daughter. Heir to Blackmont.
 * Perros Blackmont, her son. A squire.