I show Francis' father to be Joseph Riggan, Jr., b. 1712 in Isle of Wight Co., VA; m. bef. 1741 to Mary (?); d. 1770 in Bute Co., NC.His father was Joseph Riggan, Sr.; his mother was Elizabeth Gadd.Mary was born in 1711 and died 22 Sept. 1796 in Robeson Co., NC.Francis siblings were John (b. abt. 1730 in Northampton Co., NC, m. three times to Ala Bennett, Mary Younger, and Anne Bell, d. 15 Aug. 1803 in Warren Co., NC), Richard (no information), Ralph Sr. (b. 1736 in Bladen Co., NC, m. to Ann Millicent Harell, d. 1795 in Robeson Co., NC).Let me know if you have any corrections or additions to this listing.Good luck.