Mahuy Suri was the Sassanid governor of Merv

Merv

Merv , formerly Achaemenid Satrapy of Margiana, and later Alexandria and Antiochia in Margiana , was a major oasis-city in Central Asia, on the historical Silk Road, located near today's Mary in Turkmenistan. Several cities have existed on this site, which is significant for the interchange of...

 in Khorasan during the reign of Yezdegerd III. After the Arab invasion he killed Yazdegerd III, who fled to Merv from the Arabic invasion. According to the Shahnameh

Shahnameh

The Shahnameh or Shah-nama is a long epic poem written by the Persian poet Ferdowsi between c.977 and 1010 AD and is the national epic of Iran and related societies...

, the satrap of Khorasan

Greater Khorasan

Greater Khorasan or Ancient Khorasan is a historical region of Greater Iran mentioned in sources from Sassanid and Islamic eras which "frequently" had a denotation wider than current three provinces of Khorasan in Iran...

, Mahuy Suri, treacherously had one of his millers to kill Yazdgerd III, the last Persian king

Shah

Shāh is the title of the ruler of certain Southwest Asian and Central Asian countries, especially Persia , and derives from the Persian word shah, meaning "king".-History:...

, after his defeat in Iraq

Iraq

Iraq ; officially the Republic of Iraq is a country in Western Asia spanning most of the northwestern end of the Zagros mountain range, the eastern part of the Syrian Desert and the northern part of the Arabian Desert....

.