This is what I have so far on Jonathan's siblings:
Tabitha Hulan b: 1795 in VA. Jonathan Hulan b: April 22, 1797 VA; d: May 22, 1887 TN. Margaret Hulan b: 1799 NC; married Levi Gheen on February 9, 1825 in NC. Elizabeth Hulan b: 1801 SC. William Jr. Hulan b: 1804 NC; married Matilda b: 1807. Piety Hulan b: unknown in NC; married Paul Coon on March 10, 1835 in NC. Susan Hulan b: unknown in NC Thomas A. Hulan b: 1808 NC; married Clementine Farr on April 21, 1831 in NC; married also Julia Ann Holt on May 16, 1843 in NC. Osborn Hulan b: February 27, 1810 NC; d: January 17, 1897 KS; married Mary A. Jones (b: 1818 VA; d: November 1890 KS) on April 13, 1856; married also Mary Jane b: 1843 MO; d: March 6, 1910 KS.
I have their parents as William and Sarah Huling according to the 1810 census of Chesterfield Co. SC. The family had moved to Rowan Co. NC by 1820. They were (supposedly) referred to as Melungeon race in SC/NC.
I hope this information helps you. It is what I have on Jonathan's immediate family. I too am trying to go back further.