This is a slightly anglicised form of the German-Dutch-Flemish locational name Loo or Loos, both being recorded heraldically, with Arms being granted by all three countries. In our opinion the "English" surname derives from "de loose of Holland" or "de loose of Flanders", both being Huguenot recordings circa 1680. The name translates as "the dwellers by the grove" from the Olde High German "loh" recorded in the 7th Century and found in modern spellings such as "Waterloo". The modern surname spellings include Dellos, Delouch, Deluze or Deluce first recorded in England in 1697 at the Huguenot Church, Threadneedle Street, London, and De Louch (1689) and Dellos (1698). The first recorded spelling of the family name is shown to be that of John Deloose, which was dated 1666, married Elizabeth Burges at St. Dunstans, Stepney, during the reign of King Charles 11, known as "The Merry Monarch", 1660 - 1685. 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.