| U+ | art-254 |
| 01D1 | |
| Unicode Character Names | art-315 | LATIN CAPITAL LETTER O HACEK |
| Unicode Character Names | art-315 | LATIN CAPITAL LETTER O WITH CARON |
| American English | eng-004 | LATIN CAPITAL LETTER O WITH HACEK |
| français | fra-000 | LETTRE MAJUSCULE LATINE O CARON |