He was born Min Hsin-Mya (မင်းဆင်များ[1] or မင်းဆင်မြား[2]) and Tai name Manggyin Suang (မင်းၸိၼ်ႈသႂိင်) to Viceroy Thihathu of Prome and his chief queen Atula Thiri Maha Yaza Dewi in Prome (Pyay).
In January 1446,[note 2] Narapati I appointed his second son, then no older than 11 years of age, the viceroy of Prome, the second most important city in the kingdom.
[6] He gave no more trouble when his nephew Minkhaung II became king of Ava in 1480.
[7] Thado Minsaw of Tharrawaddy seized Prome, and revolted against Minkhaung II.
[8] Swa and his principal wife Saw Myat Lay had 11 children (four sons and seven daughters).