Seeking any information on the parentage and ancestry of Mary Ann Montgomery seen blow. Your help is very appreciated.

Descendants of Alexander M. Long

1 Alexander M. Long b: 15 April 1783 in North Carolina d: 28 December 1872 in Dade County, Missouri
. +Mary Ann Montgomery b: Abt 1801 in North Carolina m: 19 July 1824 in Caswell County, North Carolina
..... 2 Archibald M. Long, Judge b: December 1821 in North Carolina d: 1902 in Greenfield, Dade County, Missouri
........ +Letitia Jane Weir b: 25 November 1826 in Cooper County, Missouri m: Abt 1845 in Dade County, Missouri d: 26 April 1902
..... 2 Robert James Long b: Abt 1827 in North Carolina d: Abt 1872
........ +Eliza R. b: 1835 in Tennessee
..... 2 David M. Long b: Abt 1829 in North Carolina
........ +Virginia "Jennie" Coble b: 1835 in Kentucky m: in Virginia
..... 2 Iverson D. Long b: Abt 1831
..... 2 Markes Long b: Abt 1833
..... 2 Arnzi Long b: 1834 in Tennessee
........ +Paulina b: 1839 in Missouri
..... 2 Samuel Long b: Abt 1835
..... 2 William Mitchell Long b: Abt 1836
..... 2 Rufus C. Long b: Abt 1838 in Tennessee d: 1921
........ +Margaret "Mollie" Nelson Gillespie b: 1846 in Missouri
..... 2 Mary R. Long b: Abt 1841