I too believe the William Bush who died abt 1808 Montgomery County, Georgia to be the son of John and brother to Levi, John Jr and James Bush. Not that the copy of a document proves it but I have a copy of The North Carolina Revolutionary Army Accounts Vol W-1, page 38. William, Levy and James Bush are all listed on this document. Levy and william are listed next to each other and James is listed a few names later. Levy is listed as person number 2402 and paid 3 pounds. William number 2403 and paid 2 pounds, 16 Schillings and James is number 2410 and paid 1 pound, 10 schillings.