The relative pronouns are nominative and accusative a, oblique cases ydd, yr, y.
Thus Delitzsch formerly derived the name from an Akkadian god, I or Ia; or from the Semitic nominative ending, Yau; 7 but this deity has since disappeared from the pantheon of Assyriologists.
Each of the personal pronouns (except the 3rd plur.) exists in a longer and a shorter form: the one is used as a nominative and is a separate word, the other is attached to verbs and (in a slightly different form) to nouns to express the accusative or genitive.
In the meantime we have proper names to argue from; and these give us at least the significant indication that the Hittite nominative ended in s and the accusative in m.
Some nominative formsDis (anciently Dios, and in the Castilian of the Jews Dlo), Cdrias, Mdrcos, sastre (s a r t 0 r) have been adopted instead of forms derived from the accusative, but the vulgar Latin of the Peninsula in no instance presents two forms (subjective and objective case) of the same substantIve.