1881 for William snr. who now appears to be Williams father so your line goes William your grandfather, John Thomas his father William his father and William his father  

William  48 hawker
Catherine  40 wife
William  18 son
Thos.  16 son
Francis  14 son
George  11 son
Matilda  7 dau
Margt.  4 dau
  RG11;  5104; 13;  17
Foundry Lane Hexham 
the 1881 census is free to view and from there you can see there are other Young familes on the same page who i would assume are related to yours 

(i know you shouldnt assume anything but i feel pretty certain they are)
Thomas Young head mar. 33 hawker b. Hexham 
margaret 30 b. Hallington Coquet 
Isabelle 14 neice b. Stanley Durham
George son 5 b. Hexham
Thomas son 4 b. do.
next household
Francis head mar 26 Hawker b. new york Durham 
annie wife b. Scotland
Elizabeth dau scholar b. Hill Top Durham
Francis son b. Durnell Durham 
followed by your Williams household  

here is William (JT father) marriage to Elizabeth Stewart
Marriages Sep 1884   Hexham  10b 373  
 Coates  William      
Moorhead  Margaret     
Stewart  Elizabeth       
Young  William