Yes, I am related. My down-line is one of Chaffen's siblings, Jacob Allen. LOTS OF INFO!I don't have William Allen's Rev. Pension file, although it is often refered to in my notes. That would be worth sending to the National Archives for.
Starting in England: Zachariah Allen I married Anne ? in England. They had William Allen Iwho married Mary ? . William and Mary had: Zachariah Allen IIwho married Mary?. They had: William II who married Jemima Chaffen, George, James, Joseph, & Zachariah III William and Jemima had: Kezia, Jacob, William, Rebecca, Robert, James, John, Chaffen who married Rebecca Hutchinson, and Franky.Not certain of birth order.
In the 1850 Cenus, William, James, and John lived next to each other. Kezia married Philemon Baugh, 11 Apr 1831; Hamilton Co., IL. Jacob married Rebecca Ballard, 1832; Hamilton Co., IL. William married Celia ? . Rebecca married Bannister Fuller, 1824; Hamilton Co., IL. John married (1) Patsey Hughes, 11 Mar 1834; Hamilton Co., IL; (2) Elizabeth Colbert, 23 Jul 1843, White Co., IL. Franky married William Gregory, 1838; Hamilton Co., IL.