William Aitchison b. 1799 d. 1828 married Elizabeth Nairn b. 1780 d.1831.Children were: Mary Nairne b. 1807 d. 1878. George Nairne b. 1815 d.1847 and David d.1899 (both went to Australia in 1839 & never married.) John Robertson.
John Aitchison (Brewer, Edinburgh) married Agnes Elder. Son, Thomas William Aitchison married Constance Ann Haddow.
William Aitchison (d 1837 who aquired Kirkfield Brewery in 1810.John Aitchison (d 1857) also a brewer who had a son, William John Aitchison