I just came across your posting and there are many cousins...? As our grandparents were of many siblings. What is your father's name.
Eric,if your grandfather was siebeth, his oldest brother was my grandfather, Joseph. I am under the impression though, that non of our (Egna)grandparents; are still alive.
I also discovered some years back Michael Egna who is the grandson of Arthur. Please feel free to email me.