the father of sayyidina siddiq radiyAllahu 'anhu was abu quHafah - he was a muslim and this is specific to siddiq radiyAllahu 'anhu that 4 generations of that family were saHabah: abu quHafah / abu bakr / abdur raHman / abu atiq muhammad. what about khaTTab? what about 'affan? did they accept islam? I know there is a difference over abu talib.