Iffa and Offa West (Irish: Uíbh Eoghain agus Uíbh Fhathaidh Thiar) is a barony in County Tipperary, Ireland. This geographical unit of land is one of 12 baronies in County Tipperary. Its chief town is Cahir. The barony lies between Clanwilliam to the north-west (whose chief town is Tipperary), Middle Third to the north-east (whose chief town is Cashel) and Iffa and Offa East to the east (whose chief town is Clonmel). The area is currently administered by Tipperary County Council. The barony is within the geographic remit of the Roman Catholic Diocese of Waterford and Lismore.
Baronies were created after the Norman invasion of Ireland as divisions of counties and were used the administration of justice and the raising of revenue. While baronies continue to be officially defined units, they have been administratively obsolete since 1898. However, they continue to be used in land registration and in specification, such as in planning permissions. In many cases, a barony corresponds to an earlier Gaelic túath which had submitted to the Crown.
As the name suggests, in medieval times the territory of the barony (and its neighbour to the east) was controlled by the Gaelic clans of Uíbh Eoghain and Uíbh Fhathaidh. Following the conquest of Ireland by the Normans, much of the territory was, by royal grant, handed over to the victorious barons.
William de Camville (born about 1142, from Leicestershire, England, died about 1208) married Albreda Marmion (born about 1150) about 1164 when she was just 14 years old. She was the daughter of Geoffrey Marmion. They had a son, Geoffrey de Camville who was born about 1182, in Leicestershire, England. Geoffrey married Felicia (who was born about 1190) about 1206 when she was just 16 years old. He enters Irish records some time prior to his marriage.