1) Hindu sage 
Sage Sanatkumara was one of the Four Kumaras, the four Manasputras (mind-born-sons) or spiritual sons of Brahma according to Puranic texts of Hinduism, including the Bhagavata Purana, whose other sons were Sanaka, Sanatana, and Sanandana. Sanatkumara in Sanskrit means `eternal youth`. Though in Mahabharata, total seven sons are mentioned, namely.....