I am just starting research on my husband's family but his grandmother was a Kneifel and she had a "book" about a Martin Kneifel who's father was Jacob. They lived in La Crosse County, WI in 1869. As I've said, I just started and have no other information at this time about when they immigrated or where they came from exactly. I have a few leads and plan to continue my research. You may email me directly at LilyWham @aol.com if you wish.