While together, the couple welcomed two children of their own - Antonia and Francine - and Valli became the stepfather to Mandel's daughter, Celia, who she had with her ex-husband. Unfortunately ...

Here's what we know about Frankie Valli's family - and the restraining order that was made against his son Francesco Jr: As reported by People, Frankie has six children: Celia, Antonia ...