Once again, thank you all for the advice. I'm a newbie and appreciate the guidance.
According to Scottish Births and Baptisms Thomas McKen is born 17 Aug. 1766. Death date unknown. Son of David McKen and Margret Laing. (no other info for David & Margret)
David and Margret's children: Thomas (Larbert, 1766), David (Dunipace, 1770), John (Dunipace, 1773), & Elizabeth Caroline (Dunipace, 1775).
Thomas marries Mary Brown (date UK). Children: David (1795), Carrie John (1797), Thomas (1802), Adam (1804), & George (1807).
David marries Janet Rankin (1815, Stirling, Scotland). Children: Thomas (1816, Denny), Agnes (1818, Denny), David (1824), John (1826), Janet (1830), Duncan (1833, Renfrew), & James (1835, Denny).