Casus rectus : Casus obliquus
ez : min
tu : te
hun : we
ew : wí, wé
ewan : wan
"hun" with normal "u" which also uses Roj TV is more original than "hún" with long u, because this word comes from Proto-Kurdish *shuma which was in Avesta "yushmáke".
What we can discuss is, is for "we" the variant "ema" or the variant "eme" older? According to my sources like Paul Horn it was in Old Iranian with long á. What you mean?