Yazathingyan (Burmese: ရာဇသင်္ကြန်, pronounced [jàza̰ θɪ́ɰ̃dʑàɰ̃]; c. 1263 – c. 1312/13) was a co-founder of Myinsaing Kingdom in present-day Central Burma (Myanmar).
[2][3] But the historian Michael Aung-Thwin has rejected the assertion, given that no historical evidence any kind exists to support the claim.
[note 3] Yazathingyan entered the royal service of King Narathihapate, following the footsteps of Athinkhaya, and was joined by Thihathu.
Over the next two years, they manned the front (north of present-day Mandalay) while the king and his court relocated to Lower Burma.
In Central Burma, the brothers officially took over the leadership of the army, and consolidated their hold of the Kyaukese region, the main granary of the Pagan Kingdom.
Their youngest brother Thihathu was the least diplomatic, proclaiming himself hsinbyushin (ဆင်ဖြူရှင်, "Lord of the White Elephant") in 1295 and mingyi (မင်းကြီး, "Great King") in 1296.
In January 1300, the brothers decided to force the issue by attacking and occupying southernmost Mongol garrisons at Singu and Male.
The Mongol army began the siege of Myinsaing on 25 January 1301, and launched a major attack on the fort on 28 February 1301.
On 12 March 1301, Athinkhaya, with his brothers' support, made an offer to the Mongol command, to give them a bribe in exchange for their withdrawal.
[16][17] The Yunnan government did not agree with the withdrawal; the two senior Mongol commanders were executed for abandoning the original mission.
The youngest brother assumed a royal title of Ananda Thiha Thura Zeya Dewa in 1306, and proclaimed himself king on 20 October 1309.
[note 6] At any rate, Thihathu proclaimed himself as the successor of the Pagan dynasty, as he founded Pinya Kingdom on 7 February 1313.