Raja Syed Harrun Putra ibni Syed Hassan Jamalullail was the son of Syed Hassan bin Syed Mahmud Jamalullail (1897–1935), sometime Bakal Raja or heir presumptive to the throne of Perlis, by his commoner wife Wan Teh binti Wan Endut (d. 1952). Born in Arau, he was educated at the Arau Malay School and later at Penang Free School between 1937 and 1939. At the age of 18, he joined the Perlis administrative service, becoming a magistrate and in 1940, was transferred to Kuala Lumpur to serve as Second Magistrate in the Criminal Court.
On December 4, 1945 the British proclaimed Syed Putra as sixth Raja of Perlis. He was installed on March 12, 1949.
and in 1952 to Che Puan Mariam (née Riam Pessayanavin; 1924–1985) by whom he had three sons and one daughter. She was Miss Thailand in 1939.