I don't know about siblings for my grandfather. He passed away before I was born. My mother says he had a sister Viola, which I haven't been able to verify. Can't verify that he was married and had two children before he met my grandmother other than the fact that my 2 uncles births were before my grandparents marraige. But then again my mother insists my grandfather served in the German military based off a photo she said she saw as a child. So brick walls on my mother's side are quite a few!