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																												Prayoonwong (ประยูรวงศ์)  
Thai.
Name of a 
		      
		      
		      Chao Phraya 
who was a member of the influential 
Bunnag family and who 
served under several 
              Chakri 
kings, from 
			      
			      Rama I 
to 
			
			Rama IV. He 
was born in 
			      
Rattanakosin 
in 1788 AD as a son of Chao Phraya Akmahasena (อรรคมหาเสนา), who from 1786 to 1793 AD was
			Phraya
		      Yommaraat, i.e.
a post similar to the later
Minister of State, and
between 1793 and 1805 AD served as 
																												
			Samuha Kalahome, i.e. High Chancellor of the Interior Command of the southern districts in the reign of King Rama I. At birth he was named 
																												Dit Bunnag, and he 
had a younger brother named 
			
			Tat Bunnag, 
whom later in life became 
			
			Somdet
			
		      
		      
		      Chao Phraya
			
			
		Borom
			
			
			Maha
			
			
			
			Phichaiyaht
			(fig.), while Dit became 
Somdet Chao Phraya Borom Maha Prayoonwong, which led to the people referring to them as the Little and the Big Somdet Chao Phraya, i.e. Somdet Chao Phraya Ong Noi (สมเด็จเจ้าพระยาองค์น้อย) and Somdet Chao Phraya Ong Yai (สมเด็จเจ้าพระยาองค์ใหญ่), respectively. He started his career as a royal page to Rama I and steadily rose through the ranks holding various important posts until he in 1830, in the footsteps of his father, was appointed to
																												Samuha Kalahome, a post that he from 1851 onward
																												combined with the post of 
																												Regent of 
																												
																												
			Siam. Dit and 
his brother Tat were plenipotentiaries during the negotiations of the
			
		
		Bowring Treaty 
that was signed  
																												on 
18 April 
1855. Eight days later, 
on 26 April, 
Dit passed
away at the age of 67. 
 
			
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