The Mariu were an indigenous Australian people of the Northern Territory.
[1] In Norman Tindale's estimation the Mariu's territory covered some 1,800 square miles (4,700 km2) in the area south of where the Victoria River enters the Joseph Bonaparte Gulf.
The Bullo River also formed part of their land.
[2] In 1900, R. H. Mathews, a surveyor and self-taught anthropologist, presented a paper attributing to the Mariu — together with other "large and important tribes", from both Western Australia and the Northern Territory, such as the Gija, Perrakee, Gooniyandi, Nyigina, Bunuba, Djaru and Walmadjari — an 8 section marriage system among clans, which he illustrated in the following general table.
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