25-30 years ago,my grandfather had an affair with another woman and had a child with her. They were together for a short time before she left with the child and was not heard from again. I did not hear about this till I was in my teens and my family has no interest in meeting this child (now a man obviously).

I understand my familys anger on the situation that their father left and had a child with another woman, but the "child" had no part in it..and is still our blood relative..he's my uncle..I want to meet him.

My grandpa has passed, no one knows this womans name, and the only information we have is that he is now in his late 20's or early 30's and was named after my grandfather (which is a VERY common name)...so I know his name and aprox age...nothing else..

What are my chances of finding my uncle and letting him know he has a whole family (5 half-bro/sis, nieces, nephews ect..) that he has never met and possible is not even aware of?