'Monger' is a medieval job description for a dealer or trader, usually in skins. The description is still used occasionally today as Fell-Monger. The name derives from the Olde English pre 6th Century 'Mangere' and in the modern idiom, appears as Manger or Monger. The name Manger may also be a patronymic "the Son of Mangar" - a personal name which is recorded in the Hundred Rolls of Oxfordshire (1273) - "Manger, father of Thomas Manger, Co. Oxfordshire". In 1753, one Thomas Manger appears on the burial records of St.John the Baptist on Wallbrook, London. The first recorded spelling of the family name is shown to be that of William Manger. which was dated 1255, The Hundred Rolls of Warwickshire. during the reign of King Henry II, 1154 - 1189. Surnames became necessary when governments introduced personal taxation. In England this was known as Poll Tax. Throughout the centuries, surnames in every country have continued to "develop" often leading to astonishing variants of the original spelling.