The Siádan Matriarchy was a Harpy Matriarchy that existed in the Far Salahad region of Bulwar. It stood as one of the successor states of the former Siádanlen Queendom, alongside the Mulen Matriarchy and the Elayenna Matriarchy, after the Queendom had been subjugated by the Phoenix Empire following a decade of war. The Siádan Matriarchy was completely dissolved after the Elayenna Matriarchy, with aid from its Jaddari ally, conquered both it, and Mulen in 1453. The Siádan Matriarchs notably treasured the Crest of Ishtara, a crown of gold decorated with gemstones and the feathers of the matriarchs, named after the legendary Matriarch Ištara Ivoryfeather.