Ṛkṣa (Riksha) was one of the sons born of the womb of Dhūminī (Dhumini), wife of King Ajamīḍha (Ajamidha) belonging to Puruvaṁśa (Puruvamsa; the genealogical line of Puru). This son of Puru was probably the presverver of the main line of the kings of Puruvaṁśa. We get the name of Saṁvaraṇa (Samvarana), the son of Ṛkṣa , among the chief kings of Puruvaṁśa.