This is a partial list of the identified hereditary rulers on the Indonesian island Java, and the adjacent island Madura.
Included are some states and rulers whose existence remain open to conjecture, due to inadequate historical evidence, while others are historically verifiable. Some rulers are also considered to be mythical in that although evidence is available to claim their places in various royal family trees, there are no independent items of corroborating evidence to clarify their existence.
Some of these have continued as titular entities after the achievement of Indonesian independence in 1945.
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See also: Duchy of Surabaya |