I have a book titled "Slonaker History and Genealogy" and would be happy to share information. Various spellings of Slonaker are included; it was printed in 1941.
While there is no specific evidence, my connection to the Slonaker family is through a Christopher Slonaker, born about 1770 in Pennsylvania, died about 1840 near Capon Bridge, West Virginia. I am descended through my grandmother, Virginia Miller Badders, born in Farmland, Randolph County, Indiana, November 23, 1907. She gave me the book when she died in 1998.
My family history research (Badders and Willey) has apparently hit the proverbial brick wall.So many people have helped me and, with this book, I may be able to help others.