Which tirthankar coincided with mahabharat
In Jainism, the 22nd Tirthankar, Neminatha (also known as Aristanemi), is associated with the time of the Mahabharata. According to Jain tradition, Neminatha was a cousin of Lord Krishna, a central figure in the Mahabharata. Jain texts state that Neminatha lived during the era in which the events of the Mahabharata took place.
Thus, the Tirthankar who coincided with the time of the Mahabharata is Lord Neminatha (22nd Tirthankar).