Thado Hsinhtein (Burmese: သတိုးဆင်ထိန်း, pronounced [ðədó sʰɪ̀ɴ tʰéɪɴ]; also known as Athinkhaya of Tagaung) was governor of Sagaing, and the father of King Thado Minbya of Ava.
[3] The Zatadawbon Yazawin chronicle lists him as the 14th ruler of Tagaung.
It was per an inscription dedicated by his daughter Queen Shin Saw Gyi and her husband King Swa Saw Ke of Ava on 26 June 1398.
The inscription refers to him as Athincha (Athinkhaya), governor of Sagaing.
It may have been a titular office created to suit his status as the husband of Princess Soe Min Kodawgyi, the daughter of the founder of the kingdom.