What does the word "Belarus" mean? How did it come from?

Belarus is a landlocked country in Europe and Eastern Europe, with Minsk as its capital. The former Soviet Union joined the Republic of Belarus and became independent on August 25th, 199 1. /kloc-on February 25th, 0/9, it was changed to "Republic of Belarus", referred to as "Belarus" and "Belarus" for short. Belarus borders the Russian Federation in the east and north, Ukraine in the south and Poland, Lithuania and Latvia in the west, with a land area of 207,600 square kilometers and a population of 10045237( 1999 census). * * * There are more than 65,438,000 ethnic groups, among which the main ethnic group is Belarus.