If we are talking about the same Oswald Rahming, he was my grandfather. Born about 1925. He lived in Fox Hill, in Nassau, Bahamas. He was a wonderful musician playing several instruments most notably the Organ. He was a member of Mount Carey Union Baptist Church and played the organ every Sunday. Last time I was there the church framed several old pictures and had them displayed all over the sanctuary. There is even a picture of Jeremiah Rahming, I'm just not sure if he's the same as your grandfather.