I suspect your Diddle's are desc. from William Aduddle's son Sgt. John Adam Diddle (b. abt. 1744) (said to have md. Eleanor or Catherine Summerfield).It appears that Sgt. John Adam Diddle's children were in area of Monroe, WV.
He's said to be the John Diddle from Augusta Co, VA, who had Rev. Svc.Private>Sgt.(VA Cont'l, pension start 8-5-1833, age 89)