Another name for Susan was Susannah.4
Susan married William McKnight, son of John McKnight and Miss Maguire, on 15 Aug 1815.1 (William McKnight was born on 1 Feb 1793 in Washington County, Indiana, USA, died on 2 Jun 1842 in Washington County, Indiana, USA and was buried in Beech Grove Cemetery, New Philadelphia, Washington County, Indiana 5.)
1 Ancestry Family Trees.
2 Notes from David A. Leas and/or the 1950 Leas Family Genealogy.
3 STUART Quakers by Jim Stuart.
4 Robert W. Vandevender (http://www.gencircles.com/users/rvandevender/1/data/31536).
Find A Grave, Find A Grave (www.findagrave.com : accessed 2 Dec 2011).