Yes it would be helpful to know the children's names and dates of birth.
In the meanwhile, is this the family ......?
Just a few births from many:
Alexander Brown born Dec 1869 Aberdeen (died 1871)
Parents – Alexander Brown and Ann Mitchell
Elizabeth Mitchell Brown born Apr 1874 Aberdeen
Parents – Alexander Brown and Ann Mitchell
Census shows the family in Aberdeen in 1871 – 1881 -- etc
Oldest son David Brown born abt 1863 Aberdeen
Other children – George 1868, Alexander 1869, James 1872, Elizabeth 1874, Ann 1877, Alexander 1885, William 1890
Possible Marriage
BROWN ALEXANDER MITCHELL ANN
18 JULY 1866 168 / 2 / 186
OLD MACHAR ABERDEEN BURGH
Alexander Brown born abt 1835 Ayr (a labourer)
Ann Mitchell born abt 1846 Aberdeen
1861 censushttps://www.freecen.org.uk/search_records/59026b9fe9379091b1de3f9a/ann-mitchell-1861-aberdeenshire-aberdeen-1846-?locale=en