This is the census record I have narrowed it down to the best option but again not for certain.
1871 census
William Simpson head age 56 Cattle Dealer brn Forgue, Aberdeenshire
John Simpson son age 12 brn Rhynie, Aberdeenshire
Isabella Lindsay servant age 39 housekeeper brn Auchindoir, Aberdeenshire
Living at Old Tullochbeg Bar, Huntly, Aberdeenshire
Reg Num 202, ED10, Line 9
1861 census
William Simpson head age 46 Toll Keeper, brn Forgue , Aberdeenshire
William Simpson son age 22 brn Kinneathner, Aberdeenshire
James Simpson son age 9 brn Kinneathner, Aberdeenshire
Ann Simpson daugh age 6 brn Kinneathner , Aberdeenshire
John Simpson son age 3 brn Rhynie, Aberdeenshire
Isabella Lyndsay servant age 35 Domestic Servant brn Auchindoir, Aberdeenshire
They were living at Tollhouse, Auchairn, Cairnie, Aberdeenshire
Reg Num 178, ED3, Household schedule 35, Line 14
I think kinneather=Kennethmont and there is a christening record for a James Simpson August 22 1851....however no mother name is listed!!