The origin of the names Derawan Island, Maratua Island, Kakaban Island and Sangalaki Island in Berau East Borneo, are one of the regional literature thats getting rarely encountered and began to abandoned, so as the regional literature need to be preserved so as the next generations still know the regional literature. The used of methods in this research is descriptive methods which describe the origins legend of the name Derawan Island, Maratua, Kakaban and Sangalaki. The technique of data collection is observation technique, interview technique, documentation technique, and presentation of the data using the note technique to clarified the data. Research of origin names Derawan Island, Maratua, Kakaban and Sangalaki can be analyzed by using Morphology and Semantic until founded the words formation and the meaning of the origins names of Derawan Island, Maratua, Kakaban, and Sangalaki in Berau of East Borneo. Names of Derawan Island, Maratua, Kakaban, and Sangalaki that consist of one word explained based on formation words process, the meaning of Island, and background formation of island. The words of Derawan, Maratua, Kakaban, and Sangalaki are one of the words that came from Bajau language, it has similarity from meaning in Indonesia by using Morphology process. Derawan change to the phoneme pe into de, so Derawan (Bajau) became perawan (Indonesia), Maratua change to the phoneme “Mara” into “Mer”, so Maratua (Bajau) became Mertua (Indonesia). Kakaban's similarity happen from the sound “Kaka” words (in Indonesia) got the suffix “ban” became “Kakaban” (in Bajau), Sangalaki's similarity can be found from the sound by affixing process, the “sanga's” phoneme in laki became Sangalaki (in Bajau), having the reduplication process to be laki-laki (in Indonesia).