*Sergey/Sergei*-- Means protector, shephard, attendant, or servant.
*Ivan/also a super cute nickname is Vanya*-- Russian form of John. Means glorious gift from God.
Dmitri/various spellings like Dimitri-- Means Earth-lover
Vladimir-- Means 'has peace'.
Alexei-- Means 'helper of man'.
*Maybe Baikal? It's the deepest lake in the world and it's actually in Siberia!*
*Vladislav*-- Means 'has glory'.
Markov-- Means 'of Mars. God of war'.
Luka-- Russian form of Lucas. Means 'light'.
*Matvey*-- Means 'God's gift'. (I just like the way it sounds, ahah)
Nikolai-- Victorious, victory of the people, conqueror of the people, variant of Nicholas.
Yuri/Yury-- Variant of George
Vladik-- Means 'peaceful' or 'has glory'.
Eduard-- Means 'rich protector'.
Marko-- Means same thing as Markov(;
*Antosha*-- Means 'inestimable'.
*Lapushka(I've read that it means 'little paw'. Cute for a dog, no?)*
Adrik-- Means 'dark'.
Alexsandr/various spellings like Alexander-- Helper of man.