Ancestral property division with two wives

Hi, My question is around property division in my family. My great grand father married twice . My grand father was the only child from first marriage and from the second marriage he had two kids one girl and a boy. Now question is how the property should be divided between the family members. All of this was before 1950. 1) equal division between all family members ? Like first marriage family get equal and second also gets equal rights 50/50 2) or second marriage family gets more since they are two kids ?