Hi Paul can you give more details for William ? There is this one on the 1901 census
William Graham and a wife Eliza at 55 College Street Dumbarton..William age 43 born Ireland 1858
Ship yard Labourer children Matilda 16 Ireland ,John 14 Ireland ,Robert 10 Dumbarton ,William 6 Dumbarton ,Hugh 2 Dumbarton ...
Possible brother of Thomas
Rosie