With the new info I have now found Francis.
At 31 St Oswald St,Lancaster.
RG13/ 3990 folio 99 page 37
Wm C Greaves 37 Solicitors Clerk b Lancaster
Mary Eliz wife 38 b Shrewsbury Shropshire
Robt Whitfield son 12 b lancaster
Francis Cleminson 6 b "
And this from Free BMD looks like their marriage
William Cleminson Greaves to Mary Elizabeth Smith(good luck

)
Dec 1/4 of 1887 in Runcorn Volume 8a page 305.
I'll look for them in 1891 next.
Hope this helps to put your family into perspective now.
Carol