When John Buchanan was born about 1796, in Haywood, North Carolina, United States, his father, James Buchanan Sr, was 32 and his mother, Martha Black, was 26.
Scottish (western Scotland): habitational name from Buchanan in Stirlingshire, perhaps named with Gaelic buth chanain ‘house of the canon’.
Irish: adopted for Ó Buadhachanáin, see Bohannon .
History: This is the name of a Scottish clan associated with lands on the eastern shores of Loch Lomond and in the Lennox. — The name Buchanan was brought independently to North America from Scotland by several different bearers in the 17th and 18th centuries. George Buchanan came to MD in 1698. — James Buchanan (1791–1868), 15th President of the US (1857–61), was born near Mercersburg, PA, the son of a successful land speculator and store keeper, who had emigrated to PA from Scotland in 1783.