Mir - in Russian?

What is the origin of root "MIR" in Russian language, in meaning "world"?

Do some other Indo-Europeans have root "MIR" in this meaning (world)?

And, what is the ethimology of the following words from Germanic mithology:
Ymir, Mimir, Hymir, Bergelmir, Buri, Bor, Odin, Vili and Ve?

Are these word of Indo-European origin, or maybe of pre Indo-European
population of north Europe?

Milos Bogdanovic