Kumar

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Mahabharata, a total of seven sons is mentioned, namely: Aniruddha, Sana, Sanatsujata, Sanaka, Sanandana, Sanatkumara, Kapila, and Sanatana and further mentions that, "Knowledge comes to these seven rishis, of itself (without being dependent on study or exertion). 

Four Kumaras

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Additional 3

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