Menahem Mendel Beilis (1874-1934) was a Ukrainian Jew accused of ritual murder (see blood libel) in a notorious 1913 trial, known as the "Beilis trial" or "Beilis affair". The process sparked international criticism of the antisemitic policies of the Russian Empire. Wikipedia
The definitive Wikipedia entry for Menahem Mendel Beilis. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Menahem_Mendel_Beilis