When, why and how were Central Asian last names Russified, and why didn't it happen in other parts of the Russian Empire, like Poland or Armenia?

by Skirtsmoother

To clarify, I'm talking about Slavic suffixes like -ev.

gaidz

It kinda did happen in Armenia though. The Eastern Armenian language was heavily Russified and the suffixes in Eastern Armenian last names were changed from -ian to -yan.