Sulu
1.
the name of an island chain; the name of an archipelago.
This archipelago extends diagonally from the southwest tip of Mindanao Island Zamboanga to the northeast tip of Borneo Island,
or, as it is now called, Sabah, Malaysia.
2.
the name of a Philippine province.
Sulu is a province in the middle of the Sulu archipelago, Philippines. Its capital is Jolo. Its people are chiefly Tausug.
Formerly, Jolo was the residence of the Sultan of Sulu.