They have no court standing
can try, but they would not have standing
Yes, a father can change his child's last name. However, this depends on the custody arrangement, and who has primary custody.
The baby's grandparents could get custody.
Your mother's father is your maternal grandfather.
Whether a restraining order is granted is based on the merits of the complaint, not who filed it. If the judge sees reason to grant the order it will be.
The grandparents can get access towards there grandchildren by the mother and father dies and they get them. Or the grandparents file for custody of the children
No. Only the grandparents who have custody over you can give you consent to do so. And even then, they may not be able to give you permission to live with your other grandparents, depending on why you other grandparents were not given custody over you in the first place.
A father can get custody of the children if it can be demonstrated that that is in the best interest of the child. The father being the primary caregiver would help.
Yeah, they have several of the same rights.
As an illegal, he probably does not have access to the legal system. The grandparents should probably determine if the father is a fit parent and, if so, do the right thing.
Do you have a court order saying you have visitation? Are you the biological father? If so then YES. Go back to court and file for custody.
That depends on the custody order, but she can file for a change of custody.