Is her and her family grammatically correct?

Is her and her family grammatically correct?

Both are correct – depending on the context, and whether it is subject or object of the verb. She and her family sent me a card. I sent a card to her and her family.

What is right with family or with the family?

Either could be correct depending on the context, but “with family” (with no article) is most generally correct. “Family” without an article can refer to any type of relative and to the relatives of any number of people.

Is her and her mom correct grammar?

To make the right choice, ignore the words “and her mother.” Would you really say, “Her went to the movies”? No, you wouldn’t. You’d say, “She went to the movies.” So, when you add back “her mother,” the complete sentence is “She and her mother went to the movies.”