According to local legend, the ancestor of the royal line, Banu Naek, emerged from the sea together with his brothers Liurai and Sonbai.
The Uis Pah stayed at Menu on the south coast, close to the port Boking where trading activities took place.
The princedom of Batumean consisted of the more important Amanatun in the west, which subsequently gave its name to the entire domain, and Amanesi (Nenometan) to the east.
After 1613 the Dutch East India Company (Vereenigde Oost-Indische Compagnie or VOC) likewise competed for the wood.
After this calamity Batumean approached the Portuguese Eurasians or Topasses in Larantuka and the princely family was baptized by the Dominican missionaries.
After a major Topass defeat against the VOC forces of Kupang in 1749, large parts of West Timor submitted to Dutch suzerainty, including Amanatun.
The last raja Lodeweyk Lourens Don Louis Banu Naek was in charge of Amanatun in the first years of Indonesian independence to 1962, when it was changed into a kecamatan (administrative district).