in volume IV, Basic Documents and Indexes
- Oda, S. (Judge, 1976-2003), 194, 344, 402, 406, 421-422, 482, 933, 1105, 1138, 1144, 1158, 1186, 1252, 1326, 1398, 1401, 1421, 1438, 1506, 1510, 1554, 1556, 1567, 1621, 1622, 1644, 1646, 1675, 1723
- Oellers-Frahm, K., 151, 207, 279, 291
- Oldfather, W.A., 10
- Onyeama, C.D. (Judge 1967-1978), 1081, 1140, 1582, 1730
- Oppenheim, L., 614
- Orrego Vicuña, F., 660, 593
- Ottensooser, W., 800
- Owada, H. (Judge, 2003-), 847, 1375, 1417, 1729