After the official coronation ceremony in Lavea Em in 2147 BE, 1603 AD, Maha Sakarach 1526, His full name was called "Preah Reach Angkar Preah Borom Reachea Thireach Preah Srei Soriyoapor", which means "Priya Raja Nagar Priya Brahma Raja dhi Raja Priya Shri Suryaputra" in Sanskrit, Prakriti and Pali language, which has been distorted by the misunderstanding of some modern day scholars.

He was the second son of the Borom Reachea II whose original name was Brahma Raja II and was the younger brother of Preah Satha I, who was captured by the Siamese king and sent to Ayutthaya which is similar to word Ayodhya, during the Siamese army's attack on Longvek city in 1593 AD.

After Soriyoapor defeated Preah Keo Fva I, but the country has not yet achieved national unity, because many district governors have formed rebel factions and former monarchs, and And they all have their own ambitions to divide Cambodia to rule their respective regions in this way, and that's why Soriyoapor sent two strong generals, Techo Meas and Techo Yot, out to defeat them, All these rebellions.

Srei Soriyoapor knew that Utey Thireach was his brother, Ponhea Nou, so he ordered the army chief named Techo Meas to capture Utey Thireach alive by ordering him to be called preah Ream Thmor Koul.

[5] Srei Soriyoapor, the royal name call Borom Reachea IV, reunited Cambodia during a five-year war to crush the rebels, beginning from 1601 to 1605 AD.