The list above seems very well put together.I have one correction to make. Margaretha, daughter of John Sebastian & Anna Marie Bauman Seybert, is said to be born on April 20, 1772, source,The Berwick PA Sesquicentennial Edition, published 6 26 1936. Otherwise her father would only have been 12 years old at the time of her birth.
Anyone wishing to share other Seybert info. from Clarion Co, PA,please contact me at my email at firstname.lastname@example.org