i think that man is anup may be in the battle he was caught by some enimies and they declared anup as dead...the body which they recognised as anup... may be it was someone else...now may be anup ran from their place and reached jaitser
in shiv's past.....i think when shiv was born or about to born may be anup and his unborn baby was in danger...at the same time ira gave birth to still born female child...in order to save shiv's life anup, alok, meenu thought of a plan and exchanged babies
this is my imagination guysđ