the only robert edward in 1881 census is - there were other robert k.s within your span
Lonan Glen Rd 75 KEWLEY James Head M M 38 Lead Mine Lonan IoM
Lonan Glen Rd 75 KEWLEY Sarah J. Wife M F 27 Lead Mine Wife Lonan IoM
Lonan Glen Rd 75 KEWLEY William James Son - M 9 Scholar Lonan IoM
Lonan Glen Rd 75 KEWLEY Sarah J. Daur - F 7 Scholar Lonan IoM
Lonan Glen Rd 75 KEWLEY John H. Son - M 5 Scholar Lonan IoM
Lonan Glen Rd 75 KEWLEY Robert Ed. Son - M 4 --- Lonan IoM
Lonan Glen Rd 75 KEWLEY Thomas Son - M 2 --- Lonan IoM
Lonan Glen Rd 75 KEWLEY Fredric Son - M 5m --- Lonan IoM