Ratu usually refers to a title used by Fijians of chiefly rank, and also to Javanese word to refer the leaders, especially kings or nobles.Ratu is also a word from both the Malay and Indonesian languages which means "queen". Also Balinese ratu ‘king’, Wayan rātū ‘head of a clan, the title given to one who has been installed as chief’, Samoan lātū ‘person in charge of an undertaking, e.g. a party of builders, or, in the case of women, a weaving bee’. Most reflexes of *datu in the Philippines and western Indonesia contain a vocative marker *-q (Blust 1979).
Ratu may also refer to: