1821 Census return for the townland of Corglass

  The above shows Samuel Wilton snr in house No5 along with his wife Mary and their son Charles,living on 15 acres. The entries above in house No4 are of Charlotte and Eliza Wilton who are sisters. I wonder are they sisters of Samuel??

                      
  The above shows William, son of Samuel ,in house No 12 along with his family living on 20 acres

                      
 The above shows George, son of Samuel, in house No 15 along with his family on 12 acres

                       
  The above shows James ,son of Samuel,in house No 3 along with his family on 12 acres

                     
  The above shows Thomas,son of Samuel,in house No 17 along with his family on 22 acres

   I have been unable to find the other son Samuel in the 1821 census but I came across this entry in Kildrumferton Parish records:-
                         Death-John S. Wilton; Corglass 8/5/1875 age 75--therefore he was born in 1800