Hi Terry, sorry it took me so long to reply. I don't know if you are related or not since you don't have the generation before your grandfather. Do you have any idea when your Happel family arrived in the US? What research have you done on them in Baltimore? I am somewhat familiar with resources and would be happy to talk to you about it, please email me directly. In my research, there were only a few Happel's in Baltimore ca. 1860-1890.