Paternity

Can I change my child's last name to mine in Virginia?
I had a affair with a married woman in the state of Va. She got pregnant and had our son but has now decided to stay with her husband. I want the child to have my last name would a court grant me that?
Can I terminate my parental rights and allow adoption if I'm not the biological father?
I live in Delaware, in 2006, I acknowledged paternity for 2 children. Recently, I found out that I am not biological father of the 2 children. In 2010, the other man (real father of the 2 children) filed with the court to claim both children to stand as father of the 2 children, but denied by 13 Del. C. _ 8-609. Limitation: Child having acknowledged or adjudicated father (b). Can we get it done by filing Termination of Parental Rights and adoption? is my ex-wife and the other man's marriage necessary for TPR/adoption, or easier. If it succeeds, then will the other man's name be on the new birth certificates?
How can I transfer paternity to the biological father in Delaware?
I live in Delaware, in 2006, I acknowledged paternity for 2 children. Recently, I found out that I am not biological father of the 2 children. In 2010, the other man (real father of the 2 children) filed with the court to claim both children to stand as father of the 2 children, but denied by 13 Del. C. _ 8-609. Limitation: Child having acknowledged or adjudicated father (b). What can I do to transfer my paternity of the 2 children to the other man?
Can I amend my son's birth certificate and change his name?
My son was born in Ca. but has lived in Oklahoma for 10 years. He has his mothers maiden name instead of mine and his birth certificate lists the father as 'unknown'. Can the birth certificate be ammended to show me as the father as well as his name change? Also does he need the package from California, where he was born or Oklahoma, where he lives now? thank you
Do I need to inform the father that he is the dad?
do i have to tell the father of my unborn baby that he is the dad?