House of Viseh (Persian: خاندان ویسه) is the most important Turanian clan in Shahnameh and Persian mythology. They are descendants of Tur. Tur is father of Zadashm (زادَشْم) and grandfather of Viseh (ویسه). Viseh is the leading member of this clan. He has 6 sons named Houman, Barman, Nastihan, Lahhak, Farshidvard and Piran. Piran is the king of Khotan and the vizier of Afrasiab, the king of Turan. Houman is the highest ranking commander of Turanian army.
All of the members of this clan were killed in the battle of Davazdah Rokh. This incident was the beginning of Turan's decline and fall.
In Avesta, the House of Viseh was eliminated by House of Nowzar, but in Shahnameh, this is House of Goudarz that eliminate this clan.
References
House of Viseh Wikipedia(Text) CC BY-SA