hi bones, i havent had time to look through my own data yet to see if there is a connection............two babies and not much free time.
I have had a look on scotlands people at the 1901 census and this seems to fit what you are looking for
9 Crawford Street, Greenock
Bonar, Charles--head--33--sugarhouse labourer--born Greenock, Renfrewshire
Bonar, Annie--wife--26--born Greenock, Renfrewshire
Bonar, John--son--4--born Greenock, Renfrewshire
Bonar, Daniel--son--2--born Greenock, Renfrewshire
Bonar, James--son--5months-- born Greenock, Renfrewshire
Murphy, Charles--stepson--6-- born Greenock, Renfrewshire
McCabe, Mary--sis in law--11--sholar--born Glasgow, Lanarkshire
McCabe, William--bro in law--19--railway carter-- born Greenock, Renfrewshire
hope this helps you
Gill