Hi, I have 10 children for Andrew & Christina. One of their daughters, Elizabeth b.1848 at Fenwick married James Thomas Young in 1878 at High Gainford Farm, Fenwick.They later moved to Chadwell Place Farm, Essex. The family headstone is in the cemetery at Chadwell St Mary. One of their daughters was named Christina Wyllie Young. This James Thomas Young was brother to my g.grandfather John Young b.1854, who farmed at Western Monkridding, Kilwinning. When John died in 1909 his wife Margaret (Service) and family moved to Wigtownshire.
Don't know if I am correct or not but I have Robert Scouller, who married Agnes Gemmill in 1858, later marrying Mary Anson in 1861, but at the moment don't know where.
I have spouses for most of Andrew & Christinas children, but not Andrew b.1837 or Christina b1840. Do you possibly have details for them?
Are you connected through the Gemmill or Wyllie family?