O'BRIEN Pierce F. 1206 Private
O'CONNOR Brian 1300 Private
O'CONNOR Roderick 1301 Private
O'DONNELL Albert Bernard 1790 Private, Captain Royal Warwickshire Regiment
O'DONNELL B. 1468 Private
O'DONNELL M. Serjeant Major in 1911 and was a Lieutenant in the 4th (Royal Irish) Dragoon Guards in 1920s.
O'HARA Terence 1721 Private, Private Corps of Hussars 80209
O'HALLORAN GILES Robert Private Hussars 34111, Second Lieutenant KEH. Taken Prisoner of War 9/04/1918 and DOW 26/04/18 aged 21. Son of Thomas O'Halloran Giles and Jean O'Halloran Giles, of Adelaide, Australia. Buried in TOURNAI COMMUNAL CEMETERY ALLIED EXTENSION, BELGIUM.
O'HEA James Joseph 1128 Private, Second Lieutenant West Kent Yeomanry, Second Lieutenant Life Guards, Lieutenant Colonel Liverpool Regiment
O'KELLY A. N. Captain attached Tank Corps, then Lieutenant Colonel
OKIE Howard C. 932 Private
OLDEN James 1531 Private
OLDMEADOW L. J. Surgeon. Lieutenant King's Colonials 1902 (Photograph see Figure 4).
OLIPHANT Marcus. Private King's Colonials 1902.
OLIVER Charles Frederick 424 Private, Second Lieutenant Tank Corps
OLIVER Cuthbert Hanson Second Lieutenant, Lieutenant Army Service Corps
OLIVER Harry James Gordon 1269 Private, Second Lieutenant Tank Corps
OLIVER William John 1379 Private, Private Labour Corps 230749
OLLEY Martin C. 1653 Private, Private Machine Gun Corps 105388
O'NEILL Conrade 1540 Acting Corporal
O'NEILL Fergus 1576 Private, Private Tank Corps 317936, Private Lancashire Fusiliers 45491
O'NEILL Patrick 1511 Private
O'REGAN Michael 838 Private
ORMSBY Richard Gilbert 2083 Private, KIA 19/10/18 aged 29. Son of Dr. G. H. Ormsby and Mrs. L. Ormsby of Forrest Road, Rondebosch, Cape Town, South Africa. Buried in CAMBRIN MILITARY CEMETERY, FRANCE.
ORR Walter GS/6329 Private Dragoon Guards GS/6329, Private KEH, Private Corps of Dragoons
ORR_EWING . Second Lieutenant in photograph at Marlborough Barracks, Dublin 1918 see Figure 33.
OSBORNE Arthur 1114 Private
OSBORNE Henry (Herbert) Edward Captain, Military Cross Lieutenant 1914/15 Star, BWM, Victory Captain London Gazette 4/10/1919
OSWALD Cecil A. H. 1428 Corporal
OTTREY C. E. 2020 Private, Private Royal Scots Greys, Private Sherwood Rangers, Private Middlesex Yeomanry
OWEN Henry 1578 Private, Private Northumberland Fusiliers GS/59071
OWEN Henry Belton 997 Private, Private British West Indies Regiment 4959
OYLER Archibald G. 1396 Private, Private Northumberland Fusiliers 61286
OZZARD Harold Johnson 1256 Private, Lieutenant Royal Irish Fusiliers