| Singular | Plural | |
|---|---|---|
| Nominativ | diatessaron | diatessara |
| Genitiv | diatessari | diatessarorum, diatessarum |
| Dativ | diatessaro | diatessaris |
| Akkusativ | diatessaron | diatessara |
| Ablativ | diatessaro | diatessaris |
| Vokativ | diatessaron | diatessara |
12 (13) Formen für „diatessaron“