would love to know what you are finding out. My grand father was Harry James Schrimpf of Fargo N Dakota. His father was Frederick (& Olga) Schrimpf (three sons Frederick, Harry, and Roger).
Frederick Sr's father was Gustof (wife first name unknown but last name was Greiner). This was all orally passed down to me by my Grandmother Schrimpf (Aichele) before she passed. Not a lot on the internet about this family. I did find out through a distant cousin that some of our ancestors changed their names to Shrim and live possibly in CA.