http://freepages.genealogy.rootsweb.ancestry.com/~katy/bowman/b14137.html
Note: this genealogy of Cornelius includes a reference to a note from Bowman family members in 1801 that Cornelius was the son of Peter Bowman of Augusta County, and also mentions a book "Cornelius Bowman, A Founding Father of America and some of His Ancestors and Descendants", by Ed Bowman that asserts that claim. Additional research may be necessary.