Yes, there is a connection. Veni Madhav is considered the presiding deity (a form of Lord Vishnu) of Prayagraj. Prayers are often offered to Veni Madhav Ji during the Veni Daan ritual. Some legends suggest Lord Veni Madhav assures good fortune and longevity to women who perform Veni Daan at the Sangam. Visiting the Veni Madhav Temple in Daraganj, near the Sangam, is often part of the pilgrimage for those performing Veni Daan.