Here is what I know about my McKay relatives from Dornock, Scotland.
John and Merran (Marion) McKay lived in Dornock (probably Proncy).He lived 1786-1859.She lived 1799-1872 (died at Cambusavie, Dornock). They had 9 children: James (1820-1861, Ontario) John (1821-1822, Proncy) Elspie (1823-?) Catherine (1825-?) Margaret (1827-?) Christie (1830-?) William (1832-1909, Ontario) John (1835-?) Andrew (1837-?, Ontario)
James, William, John, and Andrew (at least) immigrated to Canada, perhaps on the Barque Ellen in 1848.James married Ruth Havens in 1853 and they had 4 children.Ruth then married James' brother William and they had 4 more children.
I hope this helps you.If this information connects to anyone else, please let me know.