All I know is that Frank Edward Gilmer (1862-1933) had "Erfurt" listed as mother's name on his death certificate. Birthplace was Unk. Germany. His father's name was unknown.
The Gilmer family name may have been originally Bourzutschky or Bourzoutschy. The family lived first in New York, and later in Michigan.
Frank Gilmer had a long career as a typesetter for newspapers in Chicago before retiring to Los Angeles, where he died.
This is a long shot re the Erfurt/Erfurth connection. Thanks for any clues.