Hi
I'm not sure how much more info you require or how much of this you have:
There are 3 baptism entries in Kirkcudbright that might fit:
26 Aug 1824 son of John Rae and Janet McClure
20 Dec 1819 son of Alexander Rae and Mary Sim
11 May 1818 son of Samue Rae and Elisabeth Wallace
Also in Girthon:
31 Dec 1818 son of Nelson Rae and Isabella Porteous
1851 Census
Castle St, Kirkcudbright
Alexander B Rae, 29, cabinet maker, employing 2 men, b. Kirkcudbright
Jessie Ann, wife, 23,grocer, b. Whithorn, Wigtownshire
Elizabeth Rae, 13, daughter, b. Kirkcudbright
Elizabeth Ross, servant, 19, b. Kirkcudbright
Not sure about the age of Elizabeth. This from a transcription but have checked on the free search on SP and it has her as 13 there. Need to do some further checks.
In 1861, they are still there
High Street, Kirkcudbright
Alexander B, 39, master builder and cabinet maker, emp 4 men and 3 boys, b. Kirkcudbright
Jessie Ann, 34, b. Whithorn
In 1841, there is an outside possible for him,
High Street, Kirkcudbright
Alexander Rae, 60, Ag Lab
Mary, 55
Alexander, 25, house painter
William, 13
Robert, 10
All born county.
Gadget