House Blackwood is a noble family from the Riverlands in the world of A Song of Ice and Fire. They are known for their ancestral seat, Blackwood Hall, which is located near the Weeping Water river. The family is recognized for their loyalty to the Targaryens and their long-standing rivalry with House Bracken. The sigil of House Blackwood features a silver tree on a black field, symbolizing their connection to the ancient weirwood trees. The family motto is "The Old Gods Are With Us," reflecting their worship of the Old Gods of the Forest. House Blackwood has a rich history and plays a significant role in the political landscape of the Seven Kingdoms.