Sultanate of Siak Sri Indrapura
The Sultanate of Siak Sri Indrapura, often called Sultanate of Siak (Indonesian: Kesultanan Siak Sri Inderapura; Jawi: كسلطانن سياك سري اندراڤور), was a kingdom that was located in present-day Siak Regency, and other nearby regions from 1722 to 1949. It was founded by Raja Kecil, who had close relations with the Johor Sultanate, after he failed to seize the Johor throne.
Source: Wikipedia — Sultanate of Siak Sri Indrapura (CC BY-SA 4.0)