A:

Final Fantasy VI - Cid Del Norte Marquez raised Celes Chere as if she were his own daughter.
Final Fantasy X - Cid is the father of Rikku and Yuna's unckle.
Final Fantasy XII - Doctor Cidolfus Demen Bunansa (Cid) is Balthier's father.

Even tho they're not directly related they still play major role in their lives:

Final Fantasy VIII - Cid Kramer helped his whife Edea to raise orphaned children (Squall, Selphie, Irvine...)
Final Fantasy IX - Cid Fabool IX who Garnet considers as her unckle took Eiko along with his wife Hilda as their adoptive daughter at the story's end.

FQ.