At least how many people are sitting at the table?

Question

At a family party, a grandfather, a grandmother, two fathers, two mothers, four children, three grandchildren, one brother, two sisters, two sons, two daughters, one father-in-law, one mother-in-law, and one daughter-in-law, sit at a table.

At least how many people are sitting at the table?

Answer 1

7 peoples.

Mr.X (as Grandfather)

Mr.X & Mrs. X has one son who is married and have 3 child (1 boy and 2 Girls)

Answer 2

There were seven members in the party.

Answer 3

7 people sitting at the table.