Tachkastan also known as Tashik in Tang Chinese and Tayyaye in Syriac was a 7th century CE Arab State in Al-Jazizah, Iraq. Its Manichean polity was ruled mainly by Sadducees. Its Kings included:

Hani ibn Qabisa d.628

Hormizd of Nisibis 4 yrs. d.632

Emir Ambrus 12yrs. d.644

King Tashik 12yrs. d.656

Abu Turab 5yrs. d.661

Hassan 9yrs. d.670

Hussein 20yrs. d.680

Abdallah ibn Al-Zubayir 12yrs. d.692

After Abdul Malik ibn Marwan conquered Abdallah ibn Al-Zubayir in 692 it turned into the Umyyad Caliphate.