In 1851 census in Westgate, William has a brother, James, Journeyman Sadler, age 40, born Hexham, living with him.
HO107/2404/127/62
In 1841 census, James is living in the same street as George Robson and Mary, Battlehill in Hexham, with wife Isabella and family.
HO107/840/6/35/19
Familysearch has a baptism, 2 Dec 1810, Hexham, of a James Robson, but he is the son of George and Barbara.
Do you have the 1841 census ref, or further info to find the other George (ex Soldier) and Barbara in 1841 census?
Alan.