As you are not married, she has sole legal custody. You have to locate them and serve her with a Petition for Parentage, and for custody. I don't know enough to know if you could take custody of one child. Her nationality is not going to be relevant to the case unless she wants to move to the Philippines. Hire a PI and find your family then file a case.
Answered on Aug 12th, 2020 at 7:48 AM