Sithu Kyawhtin of Toungoo

Sithu Kyawhtin of Toungoo (, ; died 1481) was Viceroy of Toungoo from 1470 to 1481, and a general in the Ava military. He was the maternal grandfather of Mingyi Nyo, the founder of Toungoo Dynasty of Myanmar. He was a son-in-law of Crown Prince Minye Kyawswa of the Forty Years' War fame. Sithu Kyawhtin soon acted like a sovereign king of this remote region. In 1476, Sithu Kyawhtin enlarged the city of Toungoo, raising suspicions of some ministers at Ava. When news of this reached the king's ear, Sithu Kyawhtin was brought to Ava forcibly by pulling on his hair in a humiliating manner to demonstrate his obedience and loyalty to the king.

In 1480, Thihathura died, and the Ava throne was succeeded by his elder son Minkhaung II. The new king was promptly greeted by rebellions by his two brothers. Minkhaung II ordered Sithu Kyawhtin to attack Yamethin, one of the rebellious towns. Sithu Kyawhtin marched straight to Yamethin and without waiting for the reinforcements from Ava engaged the Yamethin troops in a pitched battle. He overcame the first wave of troops sent out of the town walls to meet them but his troops were defeated by the second wave and died in battle.