Karna

The premarital son of Kunti, whom she fathered with Surya. She abandoned him, he was found and raised by Adiratha. As Son of Kunti he is Kaunteya.

Karna joined the Kauravas and became the friend of Duryodhana. Its true origin was revealed after the war.

In the Mahabharata neither women nor sons are mentioned.

Vrishali, Supriya, and probably others with their sons appear in retellings.
Vrishali – daughter of Satyasena, the charioteer of Duryodhana.
Supriya – friend of Bhanumati, Duryodhana’s wife.

Read about Karna here
http://hindumythologyforgennext.blogspot.com/2012/09/karnas-karma.html
http://hindumythologyforgennext.blogspot.com/2013/12/karna-part-1-of-4.html
http://utkarshspeak.blogspot.com/2015/10/generous-karna.html

Read about Karna’s names here
http://www.lifestalker.com/2017/04/names-of-karna.html