My research of US Census records for both gg-grandparents, William McCarthy and Rosa / Rosemary / Rosylin / Rosina Gerthoffer leads me back to Senneca County.
One of my great-grandmothers is Nancy Belle McCarthy b. 28 Apr 1878 in Seneca County, Ohio, d. 03 May 1946 in Owosso, Shiawassee County, Michigan.She married Daniel Shuster (1880 - 1950) and resided in Henderson, Rush Twp., Shiawassee County.Nancy Belle (McCarthy) Shuster was one of approximately 12 children of William McCarthy (1844- 1924) b. OH, d. MI, and Rosemary (Rosa) Gerthoffer.
They had two children, Carroll (my maternal grandfather) and Francis (m. Nelson Hygema), and the family lived near Henderson, Shiawassee County, Michigan.
I have found the marriage record of William and Rosa (Gerthoffer) McCarthy from Reed Assumption Church (in Latin), and Rosa's parents and family.I find that Charles and Joseph Gerthoffer were in Bay City, Michigan, by the turn of the century.Catherine Gerthoffer m. Maurice Seifferlin / Seifferly, and I have found their cemetery transcription online and have also located them in Bay City.
I would appreciate connecting with cousins researching the McCarthy and Gerthoffer families.
Jack Sheldon, Jr. Mesa, AZ (formerly of Owosso, Michigan)