hi mirriam
sorry cant help with 1841 but did find them on 1861 through to 1891 along with their children
will give you details incase there is any info you dont already have
1871 CENCUS -
Edwin George Moon abt 1849 Baltonsborough, Somerset, England Son Baltonsborough Somerset 
 John Moon abt 1810 Frome, Somerset, England Head Baltonsborough Somerset 
 Lucy Moon abt 1827 Frome, Somerset, England Wife Baltonsborough Somerset  
Sophia Moon abt 1846 Baltonsborough, Somerset, England Daughter Baltonsborough Somerset 
1881 CENCUS -
John Moon abt 1810 Frome, Somerset, England Head Mill St, Baltonsborough, Somerset, England 
 Lucy Moon abt 1827 Frome, Somerset, England Wife Mill St, Baltonsborough, Somerset, England
1891 CENCUS -WALTHAMSTOW ESSEX
EDWARD.G.MOON -HEAD - 42YRS- BALTONSBOROUGH-ASSISTANT TO COMPANY
CAROLINE MOON- WIFE - AGE SAYS 26 BUT 

(DOUBT THAT RIGHT)BORN BRISTOL
HAROLD.E MOON - SON - 14YRS -BORN BRISTOL - CLERK
REGINALD.G MOON - SON - 13YRS - SCHOLAR - BORN??
GERALD.J MOON - SON - 10YRS - SCHOLOR - BORN KEYNSHAM
VICTOR.C.MOON - SON - 2YRS - BORN BRISTOL
VERA.L.MOON - DAUGHTER - 9MONTHS - BORN - WALTHAMSTOW
JOHN  MOON - FATHER - 81YRS - RETIRED FARMER - BORN FROME
LUCY MOON - MOTHER - 64 YRS - BORN FROME
SOPHIA MOON - SISTER - 45 YRS - HOUSEKEEPER - BORN BALTONSBOROUGH
1901 CENCUS - 
Eliza K Hewens abt 1875 Hayes, Middlesex, England Head Leicester formerly St Mary Leicestershire 
 Caroline L M Moon abt 1865 Bristol, Somerset, England Boarder Leicester formerly St Mary Leicestershire 
 Constance E Moon abt 1900 Leeds, Yorkshire, England Boarder Leicester formerly St Mary Leicestershire 
 Edward G Moon abt 1849 Baltonsborough, Somerset, England Boarder Leicester formerly St Mary Leicestershire 
 Harold E Moon abt 1877 Bristol, Gloucestershire, England Boarder Leicester formerly St Mary Leicestershire 
 Vera L Moon abt 1891 Walthamstow, Essex, England Boarder Leicester formerly St Mary Leicestershire 
 Victor C Moon abt 1889 Bristol, Somerset, England Boarder Leicester formerly St Mary Leicestershire  
Violet M Moon abt 1894 Walthamstow, Essex, England Boarder Leicester formerly St Mary Leicestershire 
hope it helps some
regards
alli