Yazathingyan (, ; –) was chief minister of Ava (now Upper Myanmar) from 1426 to 1468. He served over 67 years as a senior royal army officer and court minister under seven kings of Ava from Minkhaung I to Narapati I. He also held several governorships, most prominently at Sagaing (1413–1450).

His career in the royal service began soon after Minkhaung I's accession in 1400. Starting out as a cavalry battalion officer in the royal army, he fought against the southern Hanthawaddy kingdom in the decades-long war, and rose to become part of the Ava high command as well as a senior minister at the Ava court by the mid-1410s. After the assassinations of kings Thihathu and Min Hla in 1425, he and his elder brother Baya Gamani supported the usurper Prince Min Nyo of Kale. Near the end of the ensuing civil war in 1426, Yazathingyan, in a rare break with his brother, switched sides, and became the chief minister of the incoming power, Gov. Thado of Mohnyin.

Yazathingyan led the Ava court throughout King Thado's 13-year reign but his influence over the king waned drastically towards the end of the reign. He could not stop the eccentric king from recalibrating the Burmese calendar in 1438. The chief minister fully backed Thado's successor King Minye Kyawswa's policy to forcefully regain the vassal states in revolt. He and Gamani even co-commanded an expedition that captured the rebel states of Taungdwin and Toungoo (Taungoo) in 1441. When Minye Kyawswa died without a male heir in 1442, Yazathingyan felt powerful enough to offer the throne to the late king's brother-in-law Gov. Thihapate of Mohnyin. Only when Thihapate declined the offer, did the powerful minister offer the throne to the rightful heir, the king's younger brother, who succeeded as King Narapati.

Despite his bungled attempt as kingmaker, Yazathingyan managed to retain his powerful post throughout Narapati's 26-year reign. His notable policy successes include the 1445 truce negotiations with the Chinese during the Chinese invasions, and the 1455 border demarcation treaty with Arakan between Narapati and King Min Khayi of Arakan. His last act came in 1467 when he and his son had to transport a severely wounded Narapati, who had just survived an assassination attempt, to Prome (Pyay). The old minister's long career most probably ended with the death of the king in 1468 as he is not mentioned in the royal chronicles again.

Early career Minkhaung's reign (1400–1421) His career began with the accession of King Minkhaung I. In late 1400 or early 1401,The Maha Yazawin chronicle (1724) (Maha Yazawin Vol. 1 2006: 308) says King Minkhaung appointed Yazathingyan governor of Siboktara in 764 ME (30 March 1402–29 March 1403), a year after his accession. The Yazawin Thit chronicle (1798) (Yazawin Thit Vol. 1 2012: 212) says Minkhaung made the appointment soon after his accession in 762 ME (29 March 1400–28 March 1401). The Hmannan Yazawin chronicle (1832) (Hmannan Vol. 1 2003: 443) follows the Maha Yazawin's narrative. According to the inscriptional evidence, per (Than Tun 1959: 128), Minkhaung became king on 25 November 1400, which agrees with the Yazawin Thit's accession date of 762 ME (1400/01). This means the appointment probably took place in late 1400 or early 1401. the king appointed him governor of Siboktara, a small district about 100 km north of the capital Ava (Inwa), with the title of Yazathingyan, and his older brother governor of Singu, with the title of Baya Gamani.Yazawin Thit Vol. 1 2012: 212Hmannan Vol. 1 2003: 443(Yazawin Thit Vol. 1 2012: 276): They had a much younger brother, who later became a royal army commander with the nickname of "Yan-Lo Kywe" (ရန်လိုကျွဲ; lit. "Belligerent Buffalo") in the mid-1420s. Starting out as cavalry battalion commanders, the brothers quickly rose to become regimental commanders, and participated in several military campaigns, most notably in the decades-long war against the southern Hanthawaddy kingdom. By 1415, Yazathingyan had risen up to the Ava high command. His advice to Crown Prince Minye Kyawswa not to engage Hanthawaddy forces in Dala–Twante was famously discarded by the crown prince, who would soon fall in action in the ensuing battle.Yazawin Thit Vol. 1 2012: 256, 260Hmannan Vol. 2 2003: 40, 42–43

Yazathingyan was more than a commander. In 1408,The chronicle Maha Yazawin (1724) is inconsistent: (Maha Yazawin Vol. 2 2006: 26) says King Minkhaung appointed Yazathingyan governor of Amyint in 771 ME (30 March 1409 to 29 March 1410) but in an earlier page (Maha Yazawin Vol. 1 2006: 334) says Yazathingyan was already governor of Amyint in Kason 770 ME (29 March 1408 to 23 April 1408). The Yazawin Thit (1798) (Yazawin Thit Vol. 1 2012: 235) says the appointment took place in 770 ME (29 March 1408 to 29 March 1409), and the Hmannan Yazawin (1832) (Hmannan Vol. 2 2003: 2) accepts the correction. Furthermore, the appointment took place between 29 March 1408 and 23 April 1408 since all the chronicles (Maha Yazawin Vol. 1 2006: 334), (Yazawin Thit Vol. 1 2012: 229) and (Hmannan Vol. 1 2003: 477) say Gov. Yazathingyan of Amyint was one of the commanders of the 1408 campaign that began in Kason 770 ME (29 March 1408 to 23 April 1408). he not only became governor of Amyint but also joined the court led by Chief Minister Min Yaza as a junior amat (အမတ်, minister).(Maha Yazawin Vol. 1 2006: 336) and (Hmannan Vol. 1 2003: 479): Yazathingyan was one of the ten amats (ministers) that negotiated a ceasefire with Pegu in 1408. The 10-member delegation was led by Chief Minister Min Yaza; other members were: 2. Thihapate III of Taungdwin, 3. Thray Sithu of Myinsaing, 4. Tarabya I of Pakhan, 5. Uzana of Pagan, 6. Baya Thingyan [sic] (Nanda Thingyan of Pyinzi?), 7. Nawrahta of Salin, 8. Yazathingyan of Amyint, 9. Min Nyo of Kale, 10. Thado of Mohnyin. Then in 1413, he was promoted by the king to his most prominent post yet—as governor of Sagaing, the former royal capital across the Irrawaddy from Ava that had been held by the most senior royals. His immediate predecessor was the king's middle son Prince Thihathu, whom the king had transferred to Prome (Pyay).Yazawin Thit Vol. 1 2012: 246Hmannan Vol. 2 2003: 20

Thihathu and Min Hla years (1421–1425)

Yazathingyan retained the Sagaing post after Thihathu succeeded Minkhaung in 1421. He went to the southern front when Thihathu renewed the dormant war with Hanthawaddy in 1422.The Maha Yazawin is inconsistent: (Maha Yazawin Vol. 2 2006: 57) says Yazathingyan died in action in Dala; and the next page (Maha Yazawin Vol. 2 2006: 58) says Yazathingyan was one of the commanders of the relief force sent to the front. (Yazawin Thit Vol. 1 2012: 267) corrects that Zeya Thingyan was the commander that died in Dala in early 1422, and specifically made the point that Yazathingyan remained alive to King Narapati I's reign. Nonetheless (Hmannan Vol. 2 2003: 55–56) retains Maha Yazawin's inconsistent narrative. In 1425, Yazathingyan and Gamani decided to side with the usurpers Prince Nyo of Kale and Queen Shin Bo-Me, following the assassinations of Thihathu and his son and successor Min Hla. The brothers were part of the pro-Nyo faction that also included Sawbwa Le Than Bwa of Onbaung, Gov. Thray Sithu of Myinsaing, Gov. Thinkhaya III of Toungoo, and Gov. Thihapate III of Taungdwin.Maha Yazawin Vol. 2 2006: 60Hmannan Vol. 2 2003: 58–59 However, they faced a serious challenger in Sawbwa Thado of Mohnyin, who vehemently opposed Nyo's takeover, and went on to declare war on the Ava regime in February 1426.Hmannan Vol. 2 2003: 59

Succession crisis (1425–1426) As other senior members of the court went to the front, Baya Gamani and Yazathingyan became the de facto leaders of the Ava court.All the main three chronicles—(Maha Yazawin Vol. 2 2006: 61) (Yazawin Thit Vol. 1 2012: 272), and (Hmannan Vol. 2 2003: 60)—name Baya Gamani and Yazathingyan as the senior ministers of the court, with Gamani's name coming first. However, (Aung-Thwin 2017: 85) considers Yazathingyan to be more senior, "first in line was Yazathingyan, minister to the previous king" (Min Nyo), while calling Baya Gamani "one of the ministers". The brothers—along with their youngest army commander brother Yan-Lo Kywe—remained by the royal couple into early May even as Thado's forces closed in, and other vassals deserted.Yazawin Thit Vol. 1 2012: 271Hmannan Vol. 2 2003: 60 By mid-May, however, Yazathingyan and Yan-Lo Kywe too were wavering; they refused to go along with Gamani's plan to evacuate the couple out of Ava. In the end, only Gamani and his small battalion escorted Nyo and Bo-Me out of Ava. Yazathingyan and Yan-Lo Kywe duly surrendered,Yazawin Thit Vol. 1 2012: 272Hmannan Vol. 2 2003: 61 allowing Thado to enter Ava unopposed on 16 May 1426.(Yazawin Thit Vol. 1 2012: 272): Thursday, the 10th waxing of Nayon 788 ME = 16 May 1426

Chief Minister

Thado court (1426–1439) Yazathingyan and the few remaining ministers were pardoned by Thado, who was eager to retain the existing administration.Aung-Thwin 2017: 85 For his part, Yazathingyan soon proved his loyalty by serving with distinction in the August 1426 campaign that captured the most senior princes of the previous dynasty—Prince Tarabya and Prince Minye Kyawhtin—in Pakhan, greatly impressing the king.Yazawin Thit Vol. 1 2012: 273–274Hmannan Vol. 2 2003: 63–64 He continued to side with Thado even when Prince Minye Kyawhtin, who was pardoned by Thado, promptly fled, and raised a serious rebellion. Still, Yazathingyan could not keep his brother Gamani, who allowed himself to be captured after the death of King Nyo, out of prison. Gamani would remain in prison until late 1427 when he was asked to defend the capital region from Kyawhtin's rapidly advancing forces.Yazawin Thit Vol. 1 2012: 275Hmannan Vol. 2 2003: 66

By 1428, Yazathingyan had firmly established himself as the king's main adviser. He advised Thado to focus on consolidating the core Irrawaddy valley, and extending control to closer southeastern districts of Pinle, Yamethin and Toungoo. Thado generally followed the advice but the results were mixed. In 1429, upon Yazathingyan's recommendation, the king appointed his second son Thihathu as viceroy of Prome (Pyay) in the south, and his younger brother Nawrahta as governor of Myedu in the north, in order to defend the core region along the Irrawaddy.Yazawin Thit Vol. 1 2012: 277 However, Yazathingyan's attempt to divide its former vassals in the east and the southeast failed. In 1428, upon Yazathingyan's advice, Thado sent two separate missions to Onbaung and Yat Sauk Naung Mun, asking Onbaung to withdraw its support of Prince Minye Kyawhtin at Pinle, and Yat Sauk to end its support of Thinkhaya III of Toungoo, in exchange for Ava's recognition of the Shan states. Both missions failed to secure a deal.Yazawin Thit Vol. 1 2012: 276–277Hmannan Vol. 3 2003: 67 Yazathingyan gave a similar advice in 1430 when the combined forces of the southern Hanthawaddy kingdom and the rebel state of Toungoo laid siege to Prome. He told the king that Ava did not have enough troops to wage war on multiple fronts, and that Thado should negotiate directly with King Binnya Ran I of Hanthawaddy, and isolate Toungoo. Thado reluctantly followed the advice, and subsequent negotiations resulted in a 1431 peace treaty between Thado and Ran in which Thado agreed to cede the southernmost districts (Tharrawaddy and Paungde), and Ran agreed to end his support of Toungoo.Yazawin Thit Vol. 1 2012: 279–290Hmannan Vol. 2 2003: 73–74