I believe that Anne Alexander's father was Robert Alexanderwho was a judgein old Tryon county nc in the 1770's and 1780's.Robert sold John 200 acres of land just before John and Anne married in 1785. I do not know Anne's mother's name.
from deed abstracts of Tryon county:
Pp. 683-684: june 1784, ROBERT ALEXANDER of Lincoln co., to JOHN SUMTER of same, for 40 lbs....200 A on waters of Groves branch of Crowder's creek adj. JOHN McFARLANS entry...ROBERT ALEXANDER (SEAL),Wit: ROBERT WIER. Rec. july term 1784.