Glanvill, Ranulf de (died 1190)

English lawyer whose chief work was Tractatus de Legibus et Consuetudinibus Angliae c. 1181. In 14 books, it is valuable as the earliest treatise on the laws of England.

Glanvill was Chief Justiciar of England, during the reign of Henry II. He was born in Suffolk, near Saxmundham, and, in about 1175, he was successful over the Scottish troops under William the Lion. He eventually joined the Crusaders under Richard I, and died at Acre.