Joseph Crankfield is named in a Bond Letter of Administration, Nancy Crankfield. Date of Bond is January 15, 1796. Record in book N. folio 141. Delaware Archives
The Bond lists Moses Crankfield as the administrator of the estate of Nancy Crankfield. The heirs are: Polly Summers, Moses Crankfield, Rachel Crankfield, Nancy Crankfield, John Crankfield, Joseph Crankfield, Elizabeth Meredith, Lydia Crankfield.
Will need to research who Nancy Crankfield was married to but suspect Moses.