Alexander Fraser(b abt 1788 d. Oct 15, 1876 Newhills Aberdeen; confirms parents names) m. Jane Milne June 28, 1807. He was a soldier in the 72 Regiment of Foot.
Children: Robert Fraser (b. abt 1809-11 only states father's name; d. Nov 17, 1867 ) m. Helen Bisset
large gap in the children
Anne Fraser (b. June 12, 1830)
William Fraser (b. July 14, 1833)
Helen Fraser (b. July 1, 1836)
Jane Fraser (b. July 22, 1840)
How sure are you that these children are all siblings? 33 years after the marriage is an exceptionally long time for a child to be born - if Jane Milne was say 18 when she married in 1807, she would have been over 40 before any of the four younger ones was born, and 51 when Jane was born.
In fact it looks to me as if there are two different couples named Alexander Fraser and Jane/Jean Milne.
One (presumably the Al Fraser and Jane Milne who were married in Aberdeen St Nicholas on 28 June 1807) had at least four recorded children in Newhills, Aberdeenshire
Jean, born 5 April 1816
Alexander, born 20 October 1818
William Stephen, born 2 December 1823
Alexander, born 20 December 1826
In 1841 this family is at Mugiemoss, parish of Newhills
Alexander Fraser, 51, stone quarrier
Jean Fraser, 52
William Fraser, 18
Alexander Fraser, 6
Isobel Fraser, 20
Christian Fraser, 15
Janet Fraser, 12
all born Aberdeenshire
In 1851, at Mugiemoss, Newhills
Alexander Fraser, head, mar, 63, quarrier, born Old Meldrum
Jean Fraser, wife, mar, 62, born Kennethmont
Christian Fraser, daughter, unm 25
Janet Fraser, daughter, unm, 22
Alexander Fraser, son, unm, 17
The children all born in Newhills
In 1861 at Auchmull, Newhills
Alexander Fraser, head, wid, 73, quarrier, born Old Meldrum
Alexander Fraser, son, unm, 28, no occupation (lame), born Newhills
and incidentally you can fill in some of the gaps in time with the three daughters Isobel, Christian and Janet.
The other couple were married in Dunnottar on 18 June 1825 and had at least six children in the parish of Dunnottar, Kincardineshire
Alexander, born 20 December 1826
Anne, born 12 June 1830
William, born 14 July 1833
Helen, born 1 July 1836
Jane, born 22 July 1840
James, born 1 June 1844
This family were ar Criggie, Dunnottar, in 1841
Alexander, 45, cartwright
Jane, 35
Alexander, 15
Ann, 11
William, 8
Hellen, 5
Jane, 1
all born Kincardineshire
They were at Nether Criggie, Dunnottar in 1851; all born Dunnottar
Alexander Fraser, head, wid, 54, cartwright
Ann Fraser, daughter, 20
Jane Fraser, daughter, 18
James Leighton, servant, unm, 18, apprentice wright
As Alexander was 54 in 1851, he would have been born in about 1896/7, so he could not possibly be the one who married in 1807, even if the other couple were not still alive and kicking and living in Newhills.
Information from
http://www.freecen.org.uk and
https://familysearch.org/search/collection/igi. Never trust anything you find online unless it is an image of an original certificate. That includes not trusting what I have written. Go to
www.scotlandspeople.gov.uk and look up all the original baptism, marriage and census records that are relevant to your Frasers.