Mahishmati

Mahishmati (IAST: Māhiṣmati) was an ancient city and the capital of Haihayas in the present-day central India on the banks of Narmada River (in Madhya Pradesh), although its exact location is uncertain.

[2] The Sabha Parva (2:30) states that the Pandava general Sahadeva attacked Mahishmati, and defeated its ruler Nila.

Agni even granted the unmarried women of Mahismati liberty of not staying with only one husband forever, and moving about freely.

Harivamsha (33.1847) names the founder of Mahishmati as Mahishmant, a king who was the son of Sahanja and a descendant of Yadu through Haihaya.

John Faithfull Fleet theorized that Mahishmati was the capital of this region, which was named after a tribe called "Mahisha".

This appears to be same as "Mahishaka", which is described as a southern kingdom (that is, south of the Vindhyas and the Narmada) in the Bhishma Parva of the Mahabharata.

[2] The Sutta Nipata states that when Bavari's disciples traveled from Pratishthana to Ujjayani, Mahishmati was one of the cities on the route.