Husband of Ahalya. She had a relationship with Indra. There are two stories.
Gautama asked his son, Chirakari, to kill his mother. He did not do it. Gautama blessed him for this decision.
Gautama cursed her to become a stone until the foot of Rama touched her. Rama redeems her in the Ramayana.
For the story visit
http://www.sushmajee.com/biographies/bio-E-H/gautam.htm
http://talesfrommythology.blogspot.com/2011/07/ahalyaa-and-indra.html
https://www.hindu-blog.com/2016/12/story-of-chirakari-in-mahabharata.html