William of Norwich, child murder victim
William of Norwich (2 February 1132 – c. 22 March 1144) was an English boy whose death was, at the time, attributed to the Jewish community of Norwich. It is the first known medieval accusation against Jews of ritual murder.

William was an apprentice tanner who regularly came into contact with Jews and visited their homes as part of his trade. His death was unsolved; the local community of Norwich attributed the boy's death to the Jews, though the local authorities would not convict them for lack of proof. William was shortly thereafter acclaimed as a saint in Norwich, with miracles attributed to him.

William's story was told in The Life and Miracles of St. William of Norwich, a multi-volume Latin work by Thomas of Monmouth, a monk in the Norwich Benedictine monastery. Thomas started The Life in 1149/50; he completed volume 7 by 1173. Augustus Jessopp (1823–1914), one of the editors of the first printed edition of Thomas' work, describes Thomas as belonging to the class of those who are "deceivers and being deceived."