Thank you for your question.
Just a quick comment, we do have plural nouns like 'people.' But in this case 'family' is singular.
That is, it is a singular collective noun. The verb conjugation then requires 's'.
All of (the members of) my family always gathers together at my cousin's house for x-mas.
My family comes from Scotland.
Your family lives in Scotland?
All of your family lives here?