My husbands grandfather Frank Albert Gross Jr. of Baltimore Md says that our name was changed when his grandparents immigrated to the US from Germany. He wasn't exactly sure what the variation was but remembers his mother saying it had something to do with the double s looking like an f. So he thought it was Groff or Grofs or Grof. I have seen that I should also check for Grose, Groce, and Grohs, does anyone have any others? Sincerely Tracie Gross