This is a Cornish habitational name which derives from "Tre" meaning a homestead and a mutated form of "Ker or Ger" which translates as a hedged or fenced farm. Cornish names which have travelled from their homeland are very prone to transposition and this name is no exception, being found recorded as Tregoose (St. James Church, Clerkenwell, 1643), Trigoust (St. Martins in the Field, Westminster) in 1687, whilst John Treagose was christened at St. Leonards, Eastcheap in 1734 and in 1851 Eliazabeth Treagus married Thomas Tidy at Greyfriars, Christchurch, London on the 15th September. The first recorded spelling of the family name is shown to be that of Edwarde Traygos, which was dated 1603, married Margery Haselwood at St. Giles, London, during the reign of Queen Elizabeth I, Good Queen Bess, 1558 - 1603 . 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.