Regarding the Robert Cochran(e) of Leck that Aghadowey mentioned in the 1831 census. He leased 28 acres of land (see Griffith's Valuation and Valuation Revision records) in Leck and died there May 20, 1872, aged 70 (born ca. 1801/02). Interestingly, the Y-DNA results (111 markers) of Robert's great great grandson who currently lives in Coleraine are just in and he shows a genetic distance of 1 (gd=1) to a great great great grandson (residing in Colorado) of another Robert Cochran(e) of Burren More, Dunboe Parish (1805-1888) who immigrated to America in the late 1830's.
My Cochrane ancestors were settled in the townlands immediately south of the River Roe from Limavady (Moys, Deer Park, Ballymore) by the year 1805 but in 1921 a relative of ours visited Limavady and learned from old cousins that the family originally came from the "Macosquin district." One of our Limavady relatives, Margaret Ann Cochrane (1850-1920) married Robert Pollock of Leck and both died there.
The DNA test results of Robert Cochrane's great great grandson shows he has a genetic distance of 3 compared to members of my Limavady relatives -- a bit more remote than our Colorado cousin, but all it does mean we are all descended from the same eastern-County Londonderry Cochrane clan.
Richard Cochran, Big Rapids, Michigan