The Tausūg or Suluk people are an ethnic group of the Philippines, Malaysia and Indonesia. The Tausūg are part of the wider political identity of Muslims of Mindanao, Sulu and Palawan known as the Moro ethnic group, who constitute the third largest ethnic group of Mindanao, Sulu and Palawan. They originally had an independent state known as the Sulu Sultanate, which once exercised sovereignty over the present day provinces of Basilan, Palawan, Sulu,Tawi-Tawi, the eastern part of the Malaysian state of Sabah (formerly North Borneo) and North Kalimantan in Indonesia.
“Tausug” means “the people of the current”, from the word tau which means “man” or “people” and sūg (alternatively spelled sulug or suluk) which means “[sea] currents”. The term Tausūg was derived from two words tau and sūg (or suluk in Malay) meaning “people of the current”, referring to their homelands in the Sulu Archipelago. (Tausug | Wikipedia)