ZoHa

I think they are cosuins maybe zainab had a brother who saved zoya from fire mishap & maybe got injured or razia tried to kill him also that's how she sent zoya to orphanage with the knowledge of gaffour
In the FB razia said zainab had came with a daughter if they had a son along with zoya haider too should be shown to gaffour
So haider is here to take revenge for his Abbu & Khala's death