John McCowan was born about 1811; died on 25th Sept 1884.
Hew McCowan was born on 7 Aug 1815; died on 9 Nov 1863.
David McCowan, LL.D. was born on 17th February 1826 in Caponacre, Cumnock, Ayrshire, Scotland; died on 26th April 1908 in 7 Lynedoch Crescent, Glasgow, Scotland.