In a family gathering, there are two males who are grandfathers and four males who are fathers. In same gather

In a family gathering, there are two males who are grandfathers and four males who are fathers. In same gathering, there are two females who are grandmothers and four females who are mothers. There is atleast one grandson or a granddaughter present in this gathering. There are two husbands-wife pairs in this group. These can be a grandfather and a grandmother, or a father and a mother. The single grandfather whose wife is not present has two grandsons and a son present. The single grandmother whose husband is not present has two grand daughters and a daughter present. A grandfather or a grandmother present with their spouses does not have any grandson or grand daughter present. What is the minimum number of people present in this gathering