This is what I came up with on the children of John Bickerstaff and (Margaret (?)).
Johnson, b. ca. 1768,d. aft. 1835, wife unknown
Robert, b. 1770-1772, died on a Saturday 14 May 1836, married Nancy Robertson.
Henry, b. ?., d. ca 1827, TN,married Peggy Hannah, 8 Jun 1799, Knox Co., TN
Lydia, married John Owen, 29 Sep 1807, Roane Co., TN.
John, Jr. b. 1770-1776, d. 1836, Monroe Co., MS.
The only Andrew Bickerstaff I could find was the son of Robert and Nancy Bickerstaff.If there was another one out there, please let me know.
The only Margaret Bickerstaff I found, could only be the wife of John Bickerstaff, Sr.. More on this later.John Bickerstaff, Sr. died in 1791.His land was sold for back taxes on 16 Dec 1793, to Benjamin Knox.Was this the same Knox that John Bickerstaff served under in 1776??