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- Aceh: In the northern region of Sumatra, the Sultanate of Achin or Atjeh was founded at the end of the 15th century. A powerful Islamic state in the 16th and 17th centuries, Achin ...
- Adonara: A state on the volcanic island of the same name ...
- Aga Nonsin
- Amabi: A state in West Timor (Timor Loro Manu) which formed in 1917 the larger Kupang state ...
- Amanatun: A state in West Timor (Timor Loro Manu). The sovereignty was altered in 1962. The palace of the Raja moved from Nunkolo to SoE in 1952 ...
- Amanuban: A state in West Timor (Timor Loro Manu). The palace of the Raja is called Sonaf Naik (Big Palace) ...
- Amarasi: A state in West Timor (Timor Loro Manu) ...
- Ambeno, Ambenu, Ambeno Mosu Talip: A state in West Timor ...
- Arun: A state more or less vassal of the Sultanate of Aceh, in the Meureudu area of Sumatra. The state was part of the Federation of the XII Hulubalangs ...
- Asahan: Asahan, in east Sumatra, was founded as a state at the end of the 17th century by a son of the Sultan of Aceh. The state represented ...
Read more about this topic: List Of Indonesian Monarchies