What position was held by the uncle of Osbert fitzHervey from 1154-89?
Osbert fitzHervey: Osbert fitzHervey (died 1206) was an Anglo-Norman royal judge. Osbert fitzHervey:  Brother of Hubert Walter and Theobald Walter, Osbert served three kings of England and may have contributed to the legal treatise attributed to his uncle, Ranulf de Glanvill. Ranulf de Glanvill: Ranulf de Glanvill ("alias" Glanvil, Glanville, Granville, etc., died 1190) was Chief Justiciar of England during the reign of King Henry II (1154–89) and was the probable author of "Tractatus de legibus et consuetudinibus regni Anglie" ("The Treatise on the Laws and Customs of the Kingdom of England"), the earliest treatise on the laws of England.
Chief Justiciar of England