Interesting. My revolutionary war ancestors were all palatinate germans. When George Washington went over the delaware many of his troops were of german extraction. they actually talked to the Hessians across the lines.
the officers were usually presbyterian scotts irish. So my father’s family converted to prebyterianism —but its not clear when that happened. my revolutionary war ancestor hosted amish gatherings in his barn. That barn and his stone house is still standing in Juniata County, PA.
My family stayed presbyterian until the 1970’s when the presbyterians formed the PCUSA and that denomination went liberal. then everyone bailed out.
the SAR in northern vA is a mix of english scots irish and palatinate germans.
I had a great-great-grandmother who was a Hessian—she was born in Grossauheim which is listed as in Hesse-Cassel on one census and as in Hesse-Darmstadt on another census. But I don’t know how long her family was there (she was born in the 1830s) or if any served as mercenaries in the American Revolution. I think “Hessians” was used loosely—they were sometimes from other parts of Germany.