Wilhelm Ludwig Schulke marriage to Tina Pofahl

My grandfather Gustav August Schulke of Cushing, Iowa listed his mother as Tina Pofahl on his marriage application in Ida County in 1893.I've been trying to find a connection ever since.His father Wilhelm Ludwig Schulke lived in the Pomeranina town of Wurchow in the county of Neustettin in Prussia in the 1860s and 1870s.Does anyone have a Wilhelm Ludwig Schulke in their ancestral files?