Did he really mention that he was not shergill blood? I thought he said that the child was lost for two years and when he came back he was a changed person. (No idea if the words were to be taken in figurative or literal sense. ) So he could be the brainwashed son of BarryAsh or another child put in place of the real Shikhar.
No he didnt said he is not Shergill's blood but he said he became part of this family so it mean this only he is not blood of Shergill