This interesting surname is of English origin, and is derived from the Norman personal name "Herluin" or "Arluin". The personal name is composed of the Germanic elements "erl", warrior and "wine", friend and means "warrior friend". The personal name is first recorded as "Herluinus" in the Domesday Book of 1086. The surname development since 1225 (see below) includes the following: Roger Herlewyn (1230 Dorset), Peter Harlewyne (1279, Cambridgeshire), William Herlyn (1327, Sussex), Agnes Herlyng (1379, Yorkshire) and Robert Harlyng (1524, Suffolk). The modern surname can be found as Harlin(g), Arling, Hurlin(g), Hurlen, Urlin(g) and Urlwin. Among the recordings in London are the christening of christopher, son of Edward and Alce Harling, on January 1st 1629 at St. Andrew's, Holborn, and the marriage of Edward Harling and Elizabeth Marchant on July 13th 1635 at St. Gregory by St. Paul, Benjamin Harling married Rebecca Taylor on November 26th 1709 in London. The first recorded spelling of the family name is shown to be that of John Erlewin, which was dated 1225, The Calendar of the Patent Rolls, Kent, during the reign of King Henry 111, "The Frenchman", 1216 - 1272. 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.