Boyars
Noblemen were not tradesmen.
Russian onions are called "лук" (luk) in Russian.
Noblemen
Yes, it is correct to say "the noblemen's houses" to refer to the houses belonging to noblemen. The possessive form "noblemen's" indicates that the houses belong to more than one nobleman.
"Russia". If you mean to ask 'what is 'country' called in Russian, that is 'страна' (strana). If you mean to ask what a Russian country house is called, that is 'dacha' (in Russian: дача).
The former Russian parliament is called the Supreme Soviet of the Russian Federation.
what is Russian Parliament called
drinking vodka
A Russian space traveler is called a cosmonaut.
A russian teapot is called a samovar
Prior to the 1917 Russian Revolution, they were called "Boyars".
The salmon fish in Russian is called "лосось" (losós').