What is "prayurawongse"

Somdet Chao Phraya Borom Maha Prayurawongse or Tish Bunnag (; ; 1788–1855) was a prominent political figure of Siam during the mid-19th century as a regent for Mongkut kingdom-wide. He led Siamese fleets in the Siamese–Vietnamese War (1841–45) and became a Somdet Chao Phraya — the highest title the nobility could attain, with honor equal to that of royalty.