HI, I have a few questions about the suffixes of Russian surnames.

I. Endings suitable for -ев I'm aware of:
1. -й (Николай -> Николаев)
2. -ь (медведь -> Медведев)
What are the others?
Is -ёв an alternative ‎form of -ев?

II. Endings suitable for -ин I'm aware of:
1. -а (борода -> Бородин)
2. -ь (сталь -> Сталин)
What are the others?
Is -ын an alternative ‎form of -ин?

III. Common suffixes of Russian surnames I'm aware of: -ов, -ев, -ин, -ский, -ный.
What are the others?
Are there statistics showing the distribution of these suffixes in Russian surnames and the percentages thereof?