| U+ | art-254 |
| 038C | |
| Unicode Character Names | art-315 | GREEK CAPITAL LETTER OMICRON TONOS |
| Unicode Character Names | art-315 | GREEK CAPITAL LETTER OMICRON WITH TONOS |
| American English | eng-004 | GREEK CAPITAL LETTER OMICRON WITH TONOS |
| français | fra-000 | LETTRE MAJUSCULE GRECQUE OMICRON ACCENT |