Thanks for your reply. My earliest Cochrane that I have is David Cochrane who was born in
Canongate, Edinburgh, Scotland in 1819. His father was also David Cochrane but I do not have any information on him other than he was a baker as listed on the marriage certificate of David and Jane but was also listed as a merchant in another document.. I have just completed a history on the family of David Cochrane (1819 - 1875). He was married to Jane Allen in 1843 in Kent, England. David joined the RoyaL Artillery in 1836 and served for 21 years. He served in the West Indies for 5 yrs 11 months , Canada for 5 years 3 months and in the Crimean War for 1 year 6 months. He was a senior non-commissioned officer and was discharged in 1858 due to chronic rheumatism. David and Jane has 11 children born in England, Canada and Scotland. The family moved back to Scotland after David left the military and he died in 1875 from cardiac disease.
I seem to be at a impasse at this point but will check the National Archives of Scotland again.