Joan, I think your John Harvey is John King Harvey, son of Charles Harvey and Rebecca King.
Notes for CHARLES HARVEY:
No evidence exists that Charles was a son of William and Peggy Harvey, however he is included here based on his age, presence in the area, and association with other interrelated persons

1777 Charles Harvey lived in Linganore Hd (one taxable) [Ref R-31:9]

July 15, 1780 Charles Harry, Private, 6th Co, Middle Bn, Maryland Militia [Ref M-203]. Peden, Montgomery, p. 148

Sep 1 1780 Charles Harvey took Oath of Allegiance under Act of May 12, 1780, having nelgected to do so previously "due to ignorance of the duty owed the ocuntry." [Ref R-27:112). Peden, Montgomery, p. 149

1783 Tax Assessment for Montgomery County names 4 Harveys: Allen, Charles, William and William Jr., all in Linganore and Sugar Loaf Hundred. . Charles Harvey. MO Linganore and Sugar Loaf Hundred, p. 3. MSA S 1161-8-1 1/4/5/51

4 Harveys in 1790 Census, Montgomeery Co - Allen, Basil, Charles, William. Charles (p.90, line 95), near William, 1 free white males 16 and over, 4 FWM under 16, 4 FW Females, no other free, no slaves.

1796 Voter, Frederick Co, Democratic-Republican. Brumbaugh, I, 293

Notes for REBECCA KING:
There is no proof that the Rebecca who is daughter of Edward King and Rebecca Duckett is the same Rebecca who married Charles Harvey and had son John King Harvey abt 1801. However, the time and place is right, and there was a Harvey family in the vicinity on Bennett Creek at Long Lookt For.

Child of CHARLES HARVEY and REBECCA KING is:
i. JOHN KING3 HARVEY, b. Abt. 1801, Montgomery Co, MD.

e-mail me harvey.c.w@myactv.net