| Termen/ Term | Nr. apariții/ No. occurrences |
| OCTAV DIOCESCU | 2 |
| ODINTOV V. V. | 1 |
| ODOBESCU RADU | 1 |
| ODON MIKLOSI | 1 |
| ODOSIE | 1 |
| ODRY IOSIF | 2 |
| OECONOMO A. | 1 |
| OEDER L. | 5 |
| OER TH. V. | 1 |
| OESER | 2 |
| OGATA GEKKO | 3 |
| OGATA KENZAN | 1 |
| OHARAN LETICIA | 2 |
| OKAKUNI KICHIBEI | 1 |
| OKAZAWAYA TAHEIJI | 2 |
| OKINOBU | 1 |
| OKUHACHI | 2 |
| OKUHACHI DIN | 1 |
| OLAC VASILE | 3 |
| OLANDA | 1 |
| OLANDEZA | 18 |
| OLANU | 1 |
| OLARIAN MIRCEA | 94 |
| OLARIU DANA | 1 |
| OLARIU IULIAN | 130 |
| OLARIU JULIAN | 2 |
| OLARIU MIRCEA | 7 |
| OLARIU OCTAVIAN | 2 |
| OLDERMANN F. | 2 |
| OLESYNSKI | 1 |
| OLGA STETI | 4 |
| OLGYAI VICTOR | 1 |
| OLGYAI VIKTOR | 1 |
| OLGYAY FERENC | 2 |
| OLINESCU MARCEL | 136 |
| OLINESCU MIRCEA | 15 |
| OLIVA Y RODRIGO EUGENIO | 1 |
| OLIVAREZ REYNALDO | 1 |
| OLOS MIHAI | 4 |
| OLSZEWSKI GEORGE | 11 |
| OLTEANU STINCA AUREL | 1 |
| OLTENIA | 343 |
| OLTES IOANA | 10 |
| OLTETULUI | 1 |
| ONGAMIA UMBERTO | 1 |
| ONGHI GIOSESSO | 1 |
| ONISA SILVIA | 4 |
| ONISIFOR ZUGRAV | 1 |
| ONITA IULIA | 5 |
| ONOFREI MIHAI | 7 |