Raja (ˈrɑːdʒɑː; also spelled Rajah, from Sanskrit राजन् ), is a title for a Monarch or princely ruler in South and Southeast Asia. The female form Rani (sometimes spelled ranee) applies equally to the wife of a Raja (or of an equivalent style such as Rana), usually as queen consort and occasionally as regent. The title has a long history in the Indian subcontinent and South East Asia, being attested from the Rigveda, where a is a ruler, see for example the , the "battle of ten kings".

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