Visvamitra was a sage who was seduced by the celestial nymph Menaka, produced the daughter Shakuntala who with king Dushyanta begat a son Bharata. Vishvamitra began as a member of the lunar race, the Kshatriyas or kingly class to the Brahmanic class. Visvâmitra or Pulaha Eulacsus (Wisdom) vishvAmitra was born as a kshatriya, and the vaishvAmitrA are sometimes grouped with the agastaya (and pulastya’s own offspring) as the paulastya rAkshasA (brahma rAkshasA ruled by kubera). http://www.hindudharmaforums.com/archive/index.php?t-1736.html