I have, from David Daffron, a printout about a Sina L. Daffron who died in Sedgwick Coutny, Kansas on 27 Sep 1924, but I don't think this is the Sina you seek, because it says her father was Elmer Daffron.William Frazier's death is also in the list, died 4 Jan 1885 in Dallas County, Missouri.
David lists a Sina Daffron in Oregon County Missouri on the 1900 census, widow of William.
David lived in Edmund, Oklahoma when we corresponded in 1992. If he continued to collect Daff--- names, he probably has accumulated a lot more by now.
Sorry I can't be of more help--I never did find parents for my Billie Dafford and now believe that he may come from a Deford/Defore line.