Census - Grieve (Renfrewshire)

I'm looking for 1841/51 Census etc. for a Peter Grieve born 30 Nov 1805 in High Paisley Renf (he was deceased prior 1855, but wife could be alive). He married Jane Galloway (b 1803 also in High Paisley Renf.) on 22 Feb 1824. She died on 3 Jan 1878. They had at least one daughter Jane, b 1835 Paisley.

Reason I am searching for other children (particularly girls) - is that Jane Jnr married a William Laughlan, whose son died aged 3 yrs (date irrelevant) - and the informant was one John McLaren - a cousin. I'm trying to find the relationship of John McLaren to the family.

I have had Grieve spelt Grieve/Grive etc. (and Laughlan about 100 different ways lol)

ps. John McLaren lived at 8 Moncrieff Street, Paisley, the cousin George, died at 4 Moncrieff St, Paisley

Many thanks.