dimkka

если кому-то всё еще неясно по-русски, может на английском попробовать:

Etymology
The name Belarus derives from the term White Rus, which first appeared in German and Latin medieval literature. The Latin term for the area was Alba Ruthenia. Historically, the country was referred to in English as White Ruthenia. It is also claimed by some people that the describes the area of Eastern Europe populated by Slavic people or the states that occupied the area.[7] The first known use of White Russia to refer to Belarus was in the late-16th century by Englishman Sir Jerome Horsey.[8] During the 17th century, Russian tsars used White Rus', asserting that they were trying to recapture their heritage from the Polish-Lithuanian Commonwealth.[8]

Belarus was named Belorussia (Russian: Белоруссия) in the days of Imperial Russia, and the Russian tsar was usually styled Tsar of All the Russias—Great, Little, and White. Belorussia was the only Russian language name of the country (its names in other languages such as English being based on the Russian form) until 1991, when the Supreme Soviet of the Belorussian Soviet Socialist Republic decreed by law that the new independent republic should be called Belarus (Беларусь) in Russian and in all other language transcriptions of its name.

( http://en.wikipedia.org/wiki/Belarus )

забудьте вы свое имперско-большевистко-коммунистическое "белоруссия", будь образованным хотя бы в этом вопросе, на карте мира нет такой страны уже очень давно, скоро 20 лет как нет.

кстати, по тому же линку почитайте историю, там несколько сжато, но вывод о том кто кому и за что должен виден сразу, как и то, кто кому принес бед по всей жизни.