I also have quite a lot of information on Daniel Derflinger/Durflinger Sr. and some on Daniel Jr. Daniel Sr. married Elizabeth Neer; the Neers and Durflingers both intermarried 3 or 4 times with my husband's families in Madison County in OH.
Daniel Sr. was in Ross County, OH (tax roll) in 1812 along with brother Thomas and several other families from Loudoun County, VA. (Neers, Goldsberrys, Coes).Sold the land in Ross County in 1827 and appeared on 1830 census in Madison County and in 1840 on the Hamilton County, IN census.Daniel Jr. was born abt. 1815 in Ross County, OH.
Daniel Durflinger Sr.'s father was Heinrich Dorflinger/Durflinger who came to Bucks County, PA from Germany as Rebecca describes. I am directly descended from Heinrich's brother Jacob Dorflinger, though in my line the name changed from Dorflinger to Derflinger to Terflinger to Tarflinger to Taflinger.