There is one showing in 1881 at the farm of an Alexander Forrest:
John Watson, 36, farm servant b.Fyvie, Aberdeenshire
Address: New Craig, Udny
Hard to say if he is the correct one with out more details (and not sure really where/how you can confirm further).
Have you found George yet in 1911 to confirm his birth place?
I haven't found him yet in 1891 but in 1901 he is showing as a 24yr old ploughman I think. Born in Ellon and at Skilmafelly, Savoch, New Deer.
Monica