See my file on Peter and Catherine that includes Jacob and his family at
http://worldconnect.genealogy.rootsweb.com/cgi-bin/igm.cgi?o...Jacob's known children were Maria, Squire, Clarkson, Rachel, James Morrison, and Eliza.
Clarkson's known children were Lucinda (and apparently a twin brother), Bedford, and Wallace.
I descend from Jacob's brother, Peter, through his son Miranda who adopted the SHAFER spelling, apparently the only line that did. At least 2 of Jacob's brothers in Butler Co., OH, adopted the SHAFOR spelling, but it appears that most of Peter and Catherine's descendants have maintained the SHEAFOR spelling.