Thettawshay of Myinsaing

Thettawshay of Myinsaing (, ) was a 14th-century governor of Myinsaing. He was a core supporter of his father-in-law, King Kyawswa I of Pinya. Thettawshay is identified as an ancestor of Queen Shin Myat Hla of Ava, and of all subsequent Ava kings from Minye Kyawswa I to Narapati II.

Brief The royal chronicles provide no information about Thettawshay's personal background. He is first mentioned as governor of Myinsaing with conflicting dates: either 1341/42 in the Yazawin Thit chronicle or 1342/43 in the Maha Yazawin and Hmannan Yazawin chronicles. Thettawshay was one of the core supporters of King Kyawswa I of Pinya who seized the Pinya throne in 1341/42 Kyawswa became the undisputed ruler by 29 March 1344. In a later section about Queen Shin Myat Hla of Ava's ancestry, the two chronicles identify him as a son-in-law of King Thihathu. Since Thihathu was Kyawswa's father, Thettawshay should have been identified as a grandson-in-law, not son-in-law. The Maha Yazawin omits this Thettawshay's background altogether. However, in the section about King Mingyi Nyo's ancestry, it says Thettawshay was a son of Gov. Shwe Nan Shin of Myinsaing. The Yazawin Thit and Hmannan reject this lineage by stating that the Thettawshay, who was the ancestor of Mingyi Nyo, was a grandson of King Kyawswa I of Pinya. The Yazawin Thit continues that Thettawshay of Myinsaing was an ancestor of Queen Shin Myat Hla of Ava, whose lineage is traced through his daughter's marriage to Thihapate I of Taungdwin. The chronicle cites contemporary frescoes at the Shwe Kyaung Monastery in Pagan (Bagan), donated by the queen herself to describe her ancestry. The Hmannan accepts the Yazawin Thit's account. According to this genealogical line, Thettawshay was a great grandfather of Queen Shin Myat Hla.