Jesus (as) will be recognisable by the attributes mentioned in the Qur'an. However, there will be other factors disclosing his identity. No doubt, one of them will be the fact that he will have no relatives, family or acquaintances on earth. Indeed, no one will know him when he comes to earth for the second time. Not a single person will come out and say "I have known him for a long time, I saw him when…" simply because the people who knew him lived and died 2,000 years ago. Thus, no one will have witnessed his birth, childhood, youth or adulthood. Nobody will know a single word about him.
As explained in earlier sections of the book, Jesus (as) came into existence by the command of Allah, the command "Be!" After millennia, it is very natural that he will have no relatives on earth. Allah draws an analogy between his situation and that of Adam when He states: