Son of king Illila. Dushyanta seduced Shakuntala, promised her to make her his queen and forgot about her. When she came to him with his son, Bharata, he denied her. Only a heavenly voice let him recognize his behavior.
The story from Mahabharata inspired Kalidasa to his famous act Abhijnanashakuntalam, the recognition of Shakuntala.
Read the story here