Was "your" Jacob Anderson born in Germany? I've located info on the grave of a Jacob Anderson [b. Germany 1802] who was married to Lucy [either Lucretia or Lucinda] Killinger [b. 1808] who had at least two children live to adulthood, William R. Anderson [b. 1822, near Marion, VA] and Margaret Anderson Henegar, [b. 1842] plus two unnamed infants.
Jacob, Lucinda [?] Margaret, her husband, her daughter or granddaughter Daisy Henegar Schrader [and her husband] are all buried in the same small family plot.