Robert Hanner was the son of John Hanner (b. 1746, probably in Virginia, d. 29 Oct 1792, Surry County, North Carolina) and Martha Doak (b. 1747, possibly in Guilford County, d. aft 1794, probably in Surry County, North Carolina).
He served in the House of Commons from 1790 to 1795, and from 1807 to 1812.
He married Isabella Erwin, and their marriage bond is dated 1 Feb 1773.