This unusual name derives from "Jackett", one of the many diminutive forms of the English and Scottish personal name "Jack, Jacot, Jackett and Jacketts", the latter being the patronymic form, meaning "son of Jackett", are forms found particularly in Cornwall. The origin of "Jack" is from the Old French given name "Jaques", introduced into England after the Norman Conquest of 1066, and being the usual French form of the Latin "Jacobus", Jacob, usually taken to mean "supplanter". "Ann Jacketts" was married to"John Trenamon" on the 2nd March 1819, in Landulph, Cornwall, and the same parish records show the christening of William, son of Thomas and Susannah Jacketts on the 8th November 1835. The first recorded spelling of the family name is shown to be that of William Jaket, which was dated 1296, in the "Subsidy Rolls of Sussex", during the reign of King Edward 1, known as "The Hammer of the Scots", 1272 - 1307. 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.