Hi Tricia, when you write you have scoured the internet - does it include ancestry (free of charge 14 days)?One has to work like a detective and search piece by piece, if you know parents or siblings name or military or anything else it could help. You also have to consider that they weren't so precise in those days regarding the spelling of the last name, but maybe you know this already. When I did my own search it was all a surprise to me and I had learn step by step. It was not as if all date was collected in one, everything was scattered.
I'm sorry I don't know what chances are to find it out through a medium, but hopefully someone can help you.
I lost contact with my dad because of my parents split and we then lived in different countries and he would claim he did not know where i was, but i had trouble finding his address too but finally thought i did - and send him a letter, and I thought we lived in the same country then but we didn't. So much time went on it was painful for me thinking he had gotten the letter and would not even reply, wanting to see me for just an hour or so. Made me feel unloved and not pretty.
Then suddenly there was a letter from him describing how happy he was to get my letter and him calling, and he would jump on a ship to get to me, and finally as we saw each other . he stood outside waiting after school everything burst inside me and I knew it was him and we rushed in each other's arms. He never let me go after that.
Later he would tell me when he heard the song by Rod Stewart "I am sailing" - which is what he had to do - to see me again it reminded him a great deal of him coming to see me. At the time I was a teenager and only thought it was a song for children and paid no attention to it, Now as an adult I can listen to it and being a parent myself I have better understanding for the lyric and have ended up crying several times when listening to it, but it is tears of joy, knowing he cared. He is no longer with us.
The break up of my parents was because my dad had cheated on my mom and she left taking me with her and was filled with wantings of revenge but not realizing she let me pay a high price too. She would say she thought I would forget about him, but I never did. It was not until later I found out - by my mom's confession - that he had begged her to give me to him, but she refused - those days there was no half custody terms, and it automatically went to the mom. I loved both my parents and don't carry bitterness, I knew they were just people - people in pain. My mom would also later say she had always thought he was a really good dad, so she knew what she did hurt him real bad. And I grew up for years thinking my dad had stopped loving me and had forgotten me. Never mind my pain. I think it took years for my parents to heal or at least somewhat after their broken love story and the aftermath of it.
The bottom line was I for years thought I did not matter to my dad when he in fact had always loved me very much.
Considering your dad was born in 1911 he had close to no fatherly rights - which in my opinion should have been a crime done to both the men and the children. Then again I believe parents need help when they split, as children are caught in the middle, the parents are often in so much pain.
I don't know your case, but just want to tell you that regardless if a medium can fish up correct date it might from an emotional point of view, to get closure, to know you mattered.
You could also try on youtube meditation on how to connect with a loved one in spirit, if you believe in that sort of thing.
As a spirit before coming here I think your father chose you as his child and you him as your father - and this is so special. Know you are special and loved by him in spirit