This is the 2320th most frequent Korean word.
가족들이
"Family members."
Here, "가족들이" is used to refer to a specific group, the family members, who are implied to collectively own or have something.
1. 가족들이 갖고 있는 사진들을 봤습니다.
I looked at the photos that the family has.
In this sentence, "가족들이" emphasizes the collective action of the family members eating together.
2. 주말에 가족들이 다 함께 식사를 했습니다.
The family all ate together on the weekend.
This usage of "가족들이" signifies the family members as a unit performing the act of welcoming.