His mother was eventually raised to queen with the title of Yadanabon after his half-siblings Saw Yun and Saw Pale were born.
[3] In 1315, Tarabya supported his half-brother Saw Yun's decision to revolt against Thihathu, and the brothers moved to Sagaing.
After Thihathu's death in 1325, Saw Yun officially broke away from Pinya and founded the Sagaing Kingdom.
The commoner became the ruler of Sagaing on 5 February 1327 after Saw Yun had died leaving four young children.
(A contemporary inscription left by his mother says that Tarabya ascended the throne for he was the eldest [adopted] son of King Thihathu.