Could Bennett WHEELER, b. 1792, have been son of the one that served in the Revolution? Oath of Fidelity was signed in Harford Co., MD, by Bennett WHEELER, John LOVE's return, 3 Mar. 1778.
There were WHEELER families all over Maryland before 1792 including in St. Mary's County:
Francis WHEELER m. 19 Dec. 1775, Anna BIRCHMORE.
Moses WHEELER, m. 28 N 1778, Henrietta REDMAN.
Do you know of any unusual given names in the family?