hi elbe,
wonder if this is of any help?
1841 census- 64 canal street, paisley
thomas...age 66...silk weaver
elizabeth...age 40
elizabeth...age 20
william...age 18...silk weaver
thomas...age 16...silk weaver
john...age 14
janet...age 12
looks like william married margaret mackay 15/12/1849 paisley
looks like thomas married mary leitch 18/5/1850 paisley
looks like john married margaret fulton 18/8/1853 paisley
looks like janet married walter knox2/10/1857 paisley
1851 census- 28 thread street, paisley
thomas...age 58...weaver
elizabeth...age 50
john...age 25...weaver
janet...age 22...mill worker
1851 census- 40 george street, paisley
william mckay...age 49...weaver
william cowden...son-in-law...age 28...weaver
margaret cowden...age 29
thomas cowden...age 4 months
1851 census- 64 canal street, paisley
thomas...age 27...weaver
mary...age 25
lezzie...age 1 month
1861 census- 75 canal street, paisley
john...age 35...weaver
margaret...age 34
elizabeth...age 7
janet...age 3
margaret...age 1
1861 census- 16 sir michael street, paisley
thomas...age 38...steam loom tenter
mary...age 36
jess...age 10
thomas...age 8
elizabeth...age 3
john...age 1
1861 census- 142 george street, paisley
william...age 40...shawl maker
margaret...age 36
thomas...age 10
william...age 8
john...age 6
hugh...age 4
mary...age 1
1861 census- 11 burnside street, milton, glasgow
walter knox...age 44...blacksmith
janet...age 31
george...age 13...message boy
james...age 1
elizabeth gilchrist...age 64...visitor
1871 census- 80 st james road, glasgow
walter...age 54...drapery agent
janet...age 40
walter...age 8
elizabeth gilchrist...mother-in-law...age 78
1881 census- 80 st james road, glasgow
walter...age 64...draper
janet...age 52
walter...age 19...stationer
1881 census- 109 south wellington st, glasgow
thomas...age 57...foreman
mary...age 55
thomas...age 29...time keeper
elizabeth...age 23...weaver
john...age 21...draughtsman
alexander...age 18...commercial clerk
james...age 14...pupil teacher
1881 census- 75 canal street, paisley
john...age 55...weaver
margaret...age 56
elizabeth...age 27...mill worker
janet...age 24...mill worker
margaret...age 21...mill worker
john...age 18...shoe maker
james...age 11
1881 census- 141 george street, paisley
william...age 60...weaver
margaret...age 57
john...age 26...commerical clerk
hugh...age 23...engineer(turner
1891 census- 141 george street, paisley
william...age 70...retired weaver
margaret...age 66
john...age 36...clerk
1891 census- 22 montgomery street, glasgow
walter knox...age 74...blacksmith
janet...age 62
1891 census- 75 canal street, paisley
john...age 66...weaver
margaret...age 64
elizabeth...age 36...mill worker
margaret...age 31...mill worker
james...age 21...clerk
1891 census- 21 south wellington street, glasgow
mary...age 65
elizabeth...age 33...tailoress
1901 census- 141 george street, paisley
william...age 80...retired weaver
1901 census- 75 canal street, paisley
john...age 76...weaver
margaret...age 74
margaret...age 40...mill worker
james...age 30...clerk
as a wee note, thomas had a son called john born 17/9/1855, must be worth a look see on the sp website.
william also had a son john born 16/3/1855, also worth a look see
Joe