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