My husband and I have full custody of our granddaughters the father has nothing to do with them and the mother hardly does. My oldest granddaughter is

Dear Ms. Millee:   Typically the consent of both parents is required to change a child's name.  However, if you are the legal guardian of the children, and the parents do not consent, you would have to serve them with notice of the petition for name change.  If they do not respond then it is likely the judge will grant the name change.  If they do respond then you will have to make our your case as to why the change will be in the children's best interest. Good luck!   Regards, Cindy S. Vova Law Office of Cindy S. Vova, P.A. Broward-Miami Dade- Palm Beach 954-316-3496/561-962-2785