Sandy - I haven't done any genealogy for a long time and just noticed your message. William F. & Augusta were my grandparents. My dad was Edward Paul Yohpe. William F.'s parents were Johan Jope and Matilda Marquardt. This is on a copy of my grandparents' wedding record. From the names you have listed, like Rosenstater, I know we are related!!
My phone is 517-542-3776. I hope you get this message so I can talk with you.
9349 Cronk Rd.
Litchfield, MI 49252
I think your parents must be Bud, Mary or Edith Yahnke, from what you said about your grandparents. I have pictures of them and the three children. I would play with them when we visited Aunt Martha and Uncle Lennie is Sparta, Wisconsin.