| Sg M | Sg F | Sg N | Pl | |
| Nom | ? (rule) | lethe (rule) | ? (rule) | |
| Acc | letheene (rule) | lethee (rule) | lethe (rule) | ? (rule) |
| Gen | lethes (rule) | letheere (rule) | lethees (rule) | ? (rule) |
| Dat | lethee (rule) | letheere (rule) | lethee (rule) | ? (rule) |
| Sg M | Sg F | Sg N | Pl | |
| Nom | ? (rule) | ? (rule) | ? (rule) | ? (rule) |
| Acc | ? (rule) | ? (rule) | ? (rule) | ? (rule) |
| Gen | ? (rule) | ? (rule) | ? (rule) | ? (rule) |
| Dat | ? (rule) | ? (rule) | ? (rule) | ? (rule) |