Found on GoogleBooks:
The County Court Note-book - Volumes 1-5
The court orders payments to the wives of certain recruits from Frederick County. March court 1779 (From the records of the county court)
Mrs. Levy, wife of David Levy; six children.
The records states that the above men were soldiers in Col. Weltner's regiment.
You might try contacting NARA to check if there are surviving records of his Revolutionary War service. https://www.archives.gov/research/military/american-revolution