The expansion of Dutch colonialization into the eastern part of Sumatra caused the influence of the Siak Sultanate to wane, leading to the independence of the Deli Sultanate, the Asahan Sultanate, the Langkat Sultanate, and Inderagiri Sultanate. Likewise in Johor, where a sultan of the descendants of Tumenggung Johor was crowned, and was under British protection in Singapore. While the Dutch restored the position of the "Yang Dipertuan Muda" on Penyengat Island, and later established the Riau-Lingga Sultanate on Lingga Island. In addition, the Netherlands also reduced the territory of Siak, by establishing the Residency of Riouw (Dutch: "Residentie Riouw") which was part of the Dutch East Indies government based in Tanjung Pinang.