This was a surprise! Nice to hear from another Vallowe in the world. Have you read "Venne in America: The 19th Century Mass Emigration to America of Tenants and Small Cottage Farmers from a Rural Village in the Region of Osnabrueck," by Udo Thorner? If not, you can purchase it from the Cincinnati Library for a reasonable price. I recommend it highly because of the incredible amount of research Udo did to show the political and economic forces at play on both sides of the Atlantic. Udo was an incredible person who died unexpectedly, and at a very young age. I am hoping his wife continues their work. If you google Venne and Thorner you will see a page they put up several years ago.  Are you from Friedrich Conrad Vallowe and Regine Langkamp? Udo's footnote says there was ongoing contact between this line and Venne until the 1970s.

I'm from the St. Louis bunch, specifically Gerhard Friedrich Vallowe and Catherine Marie Elizabeth Lammert. Fred's parents were Johann Heinrich Vallowe/Anna Marie Thiemann; Johann's parents were Heinrich Vallowe and Marie-Adelheid Rehker. I'm not sure how our bunch fits in with your group, or the immigration pattern. My grandfather, Martin Heinrich, was American born, but the generations were so long (he was born in 1868, my father in 1906, I in 1953), plus my grandfather moved away from St. Louis soon after WW1 (they were traumatized by the anti-German riots) and anglicized the last name to sound like Val-low rather than "Followa." Our group was from Venne, but moved to Oppendorf by 1826. My great grandfather was born there in 1828. I live in southeastern Illinois, near Evansville, IN.