Thettawshay of Myinsaing

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^[1] or 1342/43 in the Maha Yazawin and Hmannan Yazawin chronicles.^{[2][3][note 1]} Thettawshay was one of the core supporters of King Kyawswa I of Pinya who seized the Pinya throne in 1341/42^[1] or 1342/43.^{[2][3][note 2]}

Both the Yazawin Thit and Hmannan chronicles state that Thettawshay was a son-in-law of King Kyawswa I of Pinya. He was married to the second daughter of King Kyawswa and Queen Atula Sanda Dewi.^{[note 3]} 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.^[8] The Hmannan accepts the Yazawin Thit's account.^[9] According to this genealogical line, Thettawshay was a great grandfather of Queen Shin Myat Hla.^[8][9]