I just checked the 1841 Paisley Census and found your people. I know it is not your question but may help you along.
Paisley, Middle Church, High Street, Christies Building
vol1, page1
John McLennan, age 15, Tobacco Shop, born RFW
Isabella McLennan, age 10, silk twister, born RFw
Paisley, North, Caledonia Street
vol9,page9
Agnes Boag, age 40
John Boag, age 40, spinner
Agnes Boag, age 15, thread winder
Thomas Boag, age 15, spinner
Jean Boag, age 13, spinner
Janet Boag, age 11
Mary Boag, age 9
Catherine Boag, age 7
John Boag, age 2
James Boag, age 1
All born in Renfewshire