Vishwasrao was born as the eldest son of Balaji Baji Rao at Supe near Pune ( Supe was the Jagir of Shahaji near Pune . Vishwasrao was born as the eldest son of Balaji Baji Rao in Supe near Pune ( Supe was the Jagir of Shahaji at Pune . Balaji Baji Rao was born in Supe near Pune as the eldest son of Vishwasrao ( Supe was the Jagir of Shahaji in Pune ) .