Kingdom of Sarawak - White Rajahs Brooke

The White Rajahs were a dynastic monarchy of the British Brooke family, who founded and ruled the Raj of Sarawak, located on the north west coast of the island of Borneo, from 1841 to 1946. The first ruler was an Englishman James Brooke. As a reward for helping the Sultanate of Brunei fight piracy and insurgency among the indigenous peoples, he was granted the province of Kuching which was known as Sarawak Asal (Original Sarawak) in 1841 and received independent kingdom status.

Based on descent through the male line in accordance with the Will of Sir James Brooke, the White Rajahs' dynasty continued through Brooke's nephew and grandnephew, the latter of whom ceded his rights to the United Kingdom in 1946. His nephew had been the legal heir to the throne and objected to the cession, as did most of the Sarawak members of the Council Negri.

Sarawak was part of the realm of Brunei until 1841 when James Brooke was granted a sizeable area of land in the southwest area of Brunei – around the town of Sarawak (now Kuching) and the nearby mining region of Bau – from Bruneian Sultan Omar Ali Saifuddin II. He was later confirmed with the title of Rajah of the territory. The Raj of Sarawak developed and expanded during the rule of the first two White Rajahs, growing to occupy much of the north region of the island of Borneo. The Brooke administrations leased or annexed more land from Brunei.

Wikipedia