House Blackfyre is a semi-extinct noble house from the Crownlands. A cadet branch of House Targaryen, House Blackfyre was founded by Daemon Blackfyre, a legitimized Great Bastard of King Aegon IV Targaryen. House Blackfyre is named for the Valyrian steel sword of the same name.
Their sigil was a black three-headed dragon, breathing black fire on red, the Targaryen sigil with the colours reversed. Their motto is unknown. Among the traits passed on to the Blackfyres by the Targaryens were platinum blond hair, violet eyes and the premonition-like dragon dream ability.