I have details of a family that might be relevant.
Peter Rennie, a blacksmith, born in Edinkillie in 1822, son of James Rennie and Janet Stronach. His wife Mary was born in Fordyce around 1822, according to the 1861 census. They had three children,Elshie (1850), Maryann (1854), and James (1856), all born in Duffus. By 1861, the family was living in Glasgow.