Orontes,
This should help with the family of John Stevenson and Christina Ormiston
1841: Cullochburn, Cambuslang
John Stevenson 45 Handloom Weaver & Army Pensioner
Christina Stevenson 30
George Stevenson 13
Isabella Stevenson 11
1841: Bushyhill
This is John's mother. Her death is recorded on Mortcloth 25 Jul 1847
Widw of Geo Stevenson 65
Easter Stevenson 5
Martha Stevenson 65
Margaret Stevenson 1mon
David Park 5
Margret Stevenson 1month
I suspect that that 65yr old Martha is Margaret Cochran, widow of Allan Stevenson
1851: Bushyhill, Cambuslang
John Stevenson 58
Christina Stevenson 43
*Mary Stevenson 25 Daughter ( b 12 Mar 1826)
Jannet Stevenson 9 Daughter
John Stevenson 6 Son
Andrew Ormiston 46 Brother in law
Christina Campbell 1 Grand daughter
1861: Jabernacle Row, Cambuslang
John Stevenson 68
Christine Stevenson 54
Christina Campbell 11 Niece ( a grand daughter could be referred to as Niece)
1871; Chapelton, Cambuslang
John Stevenson 79
Christina Stevenson 63
As per reply 3, John died in 1871 and Christina in 1877
Return to 1851 census for John and Christina
*Mary Stevenson from this return married Robert Spiers in Rutherglen 1851.
Banns read in Rutherglen 29 Apr 1851
Census data after marriage has her matching profile and 1st daughter and 2nd son are named Christina and John
1861: Silverbanks, Cambuslang
Robert Spiers 34 Coal Miner B Rutherglen
Mary Spiers 35 wife B Cambuslang
*Christina Spiers 10 Daughter B Cambuslang (B 20 Nov 1851)
Janet Spiers 6 Daughter B Cambuslang
Robert Spiers 4 Son b Cambuslang
John Spiers 1 Son B Cambuslang
* Matching death index in Cambulang 1863 for Christina Spiers aged 12
child of same name born in 1867 to same parents and registered in Rutherglen
1871: Rose Bank, Cambuslang
Robert Spiers 43
Mary Spiers 44
Robert Spiers 13
John Spiers 11
James Spiers 6
Christina Spiers 4
Mary Spiers other name Stevenson age 65
Death registered Cambuslang 1890
Certificate will confirm parentage ( hopefully shows John and Christina)
EDIT:
I think I have worked out who Christina Campbell b 1850 was.
On the 1841 census there is an 11 yr old daughter of John and Christina, named Isabella Stevenson.
I can't locate Isabella again
The child named Christina from 1851 & 1861 censuses married Robert Black in Campsie, Stirling in 1869.
There are 2 children on Family Search for her
On the birth of her son John Black b 1870, her name is given as: Christina Stevenson Campbell.
Her 2nd child b 1873, her name is given as Christina Cambell but her daughter was named:
Isabella Stevenson Black.
It would seem that Christina was the child of John and Christina's daughter, Isabella Stevenson