Major Charles Maitland Hamilton
Charles served in the military The Queen's Regiment, formerly the Buffs.
Source: http://www.jameshamiltonimm.pwp.blueyonder.co.uk/pafg01.htm#3
Captain Patrick Maitland Robertson-Ross
Patrick served in the military "D" Coy 8th Bn Queen's Own Royal West Kent Regiment in 1914/1915 in France.