Abu Nasr Firuz Kharshadh (Arabic: أبو نصر فيروز خوارشاذ; died December 22, 1012), better known by his laqab of Baha al-Dawla (Arabic: بهاء الدوله, romanized: Bahaʾ al-Dawla, lit. 'Splendour of the State') was the Buyid amir of Iraq (988–1012), along with Fars and Kerman (998–1012). His early reign was dominated by struggles with his rival relatives over control of the western Persian provinces, but by 998 he managed to establish his supremacy over the Buyid confederation. His reign nevertheless saw the increasing encroachment of neighbouring powers on Buyid territory, and marks the beginning of the decline of the Buyids' power. He was the third son of 'Adud al-Dawla.
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Bahāʾ al-Dawla in the context of Annazids
The Annazids or Banu Annaz, Ayyarids, Banu Ayyar (990/991–late 12th century) was a Kurdish Sunni Muslim dynasty which ruled an oscillating territory on the present-day frontier between Iran and Iraq for about 130 years. The Annazids were related by marriage to the Hasanwayhids who they were in fierce rivalry with. The legitimacy of the Annazid rulers stemmed from the Buyid amir Bahāʾ al-Dawla and the dynasty relied on the Shadhanjan Kurds.
Although Annazid authority declined in several generations, the dynasty did not disappear. In late 12th century, Surkhab III ibn Annaz was a ruler of Luristan.
View the full Wikipedia page for Annazids