(no subject)

[http://users.livejournal.com/_viola/]

Just a quick question... in a "который" clause, does "который" have to be in the same case as the noun it is referring to? What I mean is, does the appropriate case pass over the comma?

Posessive Adjectives

[giantantattack.livejournal.com]

I recently did an extra credit translation assignment for my Russian class. When I got the graded paper back I noticed that my teacher had marked this sentence:

Там были все их родственники и друзья кроме Михаилины бабушки и Иринины тёти.

Which I had translated from:

All of their relatives and friends were there except for Michael's grandmother and Irina's aunt.

She didn't think that "Михаилины" sounded right, so she asked her husband, who is a native speaker, and he said that no one would say that. But I don't think he knew what to replace it with, or she didn't ask him. Either way, what should I have used instead of Михаилины? Мишины? Or is there another way to form the possessive adjective of Михаил? And, why is Михаилины wrong in the first place?