I am getting confused as too whose Family it is

Re William born c 1851 Married to Kate;
1881/1901 he is born Weston, Herts
1891 he is born Middlesex, London and living in Weston.
1871 with Mother Mary Ann and Sister Mary Ann in Weston, born London
1861 with them again and born St George, Middlesex
1851 with Joseph, a Carpenter and Mother Mary Ann