Tags: Monarch.
Garshasp I ibn Muhammad (Persian: گرشاسپ بن محمد) mostly known as Garshasp I was the Kakuyid Emir of Hamedan including Nihawand Borujerd and western Jibal. He was the youngest son of Muhammad ibn Rustam Dushmanziyar and was the vassal king of his brother Faramurz. In 1047 the Seljuqs defeated his forces and conquered Hamadan which forced him to flee to Buyid territory where he became governor of Fars and later died in 1051/1052 in Khuzestan.