Question:
I am interested to know of any more possible instances like Sarawak and the Cocos-Keeling Islands described below, where individuals have managed to establish de facto fiefdoms or states lasting a significant amount of time. I am guessing there may of been more occurrences like these in the Age of Discovery, but i have not managed to find any.
White Rajahs of Sarawak
James Brooke received territory from the Sultan of Brunei as a reward for helping the Sultan fight of insurgents. The Brookes ruled Sarawak for three generations until it was ceded in the aftermath of WW2.
Kingdom of the Cocos Islands
John Clunies-Ross established a de facto kingdom in the Cocos Islands in the beginning of the 1800s when he established a settlement on the islands. The Clunies-Ross ruled the islands until 1978 when the islands where sold to Australia.