Hla Myat was the third child of Thado and Myat Hla.[1] She was born and grew up in Mohnyin, where her father was sawbwa (lord governor) of the region. In 1426, her father was successful in seizing the Ava throne. On the day of the coronation, Hla Myat was married off to Thihapate.[2][3]
She and her husband were first cousins (if not double first cousins). The couple had had two sons and six daughters.[4]
Shin Hla Myat was descended from a distant branch of the Pinya and Pagan royal lines from her paternal side, and from the maternal line, a two times great grandchild of King Thihathu of Pinya.
^Hla Myat apparently remained in Pakhan. Chronicles do not mention her stay in Mohnyin or referred to her as duchess of Mohnyin. Instead, she is referred to as the lord of Pakhan (ပခန်းစား) (as opposed to duchess of Pakhan (ပခန်း မိဖုရား)) as seen in (Yazawin Thit Vol. 1 2012: 282).