According to the 1851census George was born in Aberlour 1815
1861 census Aberlour 1813
No, it doesn't. The census
never gives a year of birth. If you have seen an extract from the census that tells you the (supposed) year of birth, it is a transcription, and the year of birth has been 'calculated' by subtracting the age from the census year. The census tells you the age people said they were on the day of the census, which was usually around the end of March.
His marriage certificate in 1855 shows him born & registered October 1812 at Aberlour & his parents were Thomas Stewart (deceased) & Elizabeth Bremner (deceased)
His death certificate in 1861 shows him as 45 years old (1816) his parents were (Peter?) Stewart & Elizabeth Bremner (Informant was his son in law Alexander Simpson)
He is likely to have given the correct details on his marriage. His son-in-law probably never knew his father-in-law's parents or exact age.
I found a record in Scotland's People OPR's dated 1807 for a George Stuart, parents Thomas Stuart & Elizabeth Bremner (faint writing) born in Aberlour.
I could see a marriage between Elizabeth Bremnar & Thomas Stewart in 1797 at Aberlour
My question is this. Was George being a bit untruthful about his age or not sure & do I have the correct parents ie. Thomas & Elizabeth
It probably wasn't deliberate untruthfulness, just a slightly hazy grasp of dates.
In my opinion Thomas Stewart/Stuart and Elizabeth Bremner are the correct parents. They had
Ann, baptised 20 July 1798
Robert, baptised 9 May 1801
Patrick, baptised 29 June 1803
William, baptised 18 October 1805
George, baptised 14 November 1807
Margaret, baptised 30 March 1810
John, baptised 16 December 1812
Thomas, baptised 29 July 1816
all in Aberlour.
I am not seeing any baptisms to Peter Stewart/Stuart and Elizabeth Bremner.
Looking at the (much more reliable but still no substitute for looking at the originals) transcriptions of the 1851 census on
https://www.freecen.org.uk/cgi/search.pl, I see possible records of George and all his brothers. You'd have to follow them up by checking the certificates at
www.scotlandspeople.gov.uk to be sure.