Gavriil Belostoksky (alternatively Gavrila or Gabriel,) (April 2 <small>O.S.</small> 1684-April 20? <small>O.S.</small> 1690) is the only canonized child saint in the Russian Orthodox Church. The legend of his tragic death was turned into an antisemitic blood libel. His cult, revived in Belarus in 1990s, raised concerns of human rights organizations. Wikipedia
The definitive Wikipedia entry for Gavriil Belostoksky. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Gavriil_Belostoksky