Zanish and
zanisshe you mean, I'm sure..
These irregularities rise from
epenthesis issues.
If were getting this right (I'm pretty confident we are),
sondra is in accusative
sondre, because r-ending consonant clusters cannot end words. It gets the /
-e/ so it's class B like
zanisshi. And
ferri does not get the /-e/, but loses the gemination of r, so it is in class A instead. The way we categorize things right now, class A is for irregular nouns and class B for regular.
We're not using these class markings in our vocabulary, but instead we just offer the accusatives of the nouns as supporting cases. I added the accusative of
zanisshi to the wiki, 'cause I trust ingsve knows what he's talking about