| Symbol | Unicode | HTML Number | HTML Name | HTML Name2 | Name |
|---|---|---|---|---|---|
| Ä | U+00C4 | Ä | Ä | Latin capital letter A with diaeresis | |
| ä | U+00E4 | ä | ä | Latin small letter a with diaeresis | |
| ë | U+00EB | ë | ë | Latin small letter e with diaeresis | |
| Ë | U+00CB | Ë | Ë | Latin capital letter E with diaeresis | |
| ï | U+00EF | ï | ï | Latin small letter i with diaeresis | |
| Ï | U+00CF | Ï | Ï | Latin capital letter I with diaeresis | |
| ö | U+00F6 | ö | ö | Latin small letter o with diaeresis | |
| Ö | U+00D6 | Ö | Ö | Latin capital letter O with diaeresis | |
| ü | U+00FC | ü | ü | Latin small letter u with diaeresis | |
| Ü | U+00DC | Ü | Ü | Latin capital letter U with diaeresis | |
| Ÿ | U+0178 | Ÿ | Ÿ | Latin capital letter Y with diaeresis | |
| ÿ | U+00FF | ÿ | ÿ | Latin small letter y with diaeresis | |
| ¨ | U+00A8 | ¨ | ¨ | ¨ | Spacing diaeresis - umlaut |