Bob, in case you haven't already seen it, Prussia is, and was, very distinct from Alsace-Lorraine, which has both German and French components, having been a part of each of those countries over the years.
Christian Brandner was my maternal grandfather, born Russia c. 1870, died Elgin, North Dakota, c. 1928. Hope you get this message. Regards, John Gallardo
ggary1888@hotmail.com