A son of Maharṣi Gautama. [Mahābhārata, Sabhā Parva, Chapter 21, Verse 3] states that at the time when Gautama was living in Girivraja, he had connection with a Śūdra woman of Uśīnara land and as a result of it Kākṣīvān was born to her. This Gautama was not the husband of Ahalyā. Kākṣīvān had a son named Caṇḍakauśika and two daughters named Bhadrā and Ghoṣā. [Mahābhārata, Sabhā Parva, Chapter 4, Verse 17] states that Kākṣīvān flourished in Yudhiṣṭhira's assembly.
Note: 1) It is also stated elsewhere that Kākṣīvān was the son of Dīrghatamas, the father of Gautama. See under Diṛghatamas.]