David Justice is my great-grandfather. His son Lemuel and Lemuel's wife Hester are buried in the Sugar Grove Methodist Church cemetery in Edgar County, Illinois along with the children of John Henry Justice (Albert Lindsey Justice and Cora A. Justice Hamilton).
David's son John Franklin died around 1919; don't know where. But John Franklin's children moved to Paris, Lamar County, Texas. You may find some buried in the cemeteries there.
I think David is related to George Justice, also living in Putnam County at the same time as David. George is a descendant of Johan Gustafsson who arrived in the New Sweden colony founded on the Delaware River in 1643. (Gustafsson was anglicized to Justice.) An Ancestry DNA test showed me to be 20% Scandinavian, which made no sense at all to me until I traced George Justice back to Johan Gustafsson.