| U+ | art-254 |
| 00E4 | |
| Unicode Character Names | art-315 | LATIN SMALL LETTER A DIAERESIS |
| Unicode Character Names | art-315 | LATIN SMALL LETTER A WITH DIAERESIS |
| American English | eng-004 | LATIN SMALL LETTER A WITH DIAERESIS |
| français | fra-000 | LETTRE MINUSCULE LATINE A TRÉMA |