There are records to indicate Jacob Miller's German descent and that he was an educated man. He and Marie Anna were transported to Maryland during the dispersion. They lived in Frederick County for at least six years, from 1763 to 1769, and had four children while they lived there.
On 5 Jan 1769, they were among the Germans and Acadians who departed from Fort Tobacco, Maryland aboard the schooner Brittania, bound for the German Coast of Louisiana. As the ship approached the Louisiana coast, it encountered a dense fog and a strong east wind blew it off course. Instead of landing in New Orleans, they found themselves in Matagorda Bay on the Texas coast. The Spanish who controlled the area had the passengers sent to Goliad and detained them there until 13 Sep 1769. Whey they were finally released, they traveled overland to Natchitoches, reaching that post on 24 Oct 1769. Although the local residents had hoped the newcomers would remain and cultivate the land around Natchitoches, the group moved on. By May 1770 they had moved on to Iberville along the upper west bank of the Mississippi River. From Iberville, Jacob and his family moved to the Prairie des Femmes, in the area where Bayou Borbeaux joins Bayou Fusilier (the Grand Coteau area).
I know this doesn't answer your question , hopefuuly it will help. Also if you haven't checked out familyatlouisiana.com you should. There is several books on Jacob Miller family but I only have the first volume. Hopefully someone will have the others and can answer.