Kaun Apna Kaun Paraya (1963)

During a ship journey which is destroyed a family of mother Maya her husband son Anil and daughter Mangala and grandson Ramu (Mangala's son) are separated but Maya and Ramu end up being together while the rest vanished. Maya brings up Ramu as her Son Anil whom she had lost and Ramu aka Anil grows up into a strong young man and works for a man named Sampathlal. Sampathlal has a son Champathlal who loves Lata and a daughter Asha. Anil meets Asha and both of them fall in love and get married. On the day of the marriage Mangala returns to see her son Anil who is non other than her Ramu. The Family is reunited and all goes well.