Thane or Thegn, a title of social distinction among the Anglo-Saxons, bestowed, in the first instance, upon men bound in military service to the king, and who came to form a nobility of service as distinguished from a nobility of blood; these obtained grants of land, and had thegns under them; in this way the class of thegns widened; subsequently the name was allowed to the ceorl who had acquired four hides of land and fulfilled certain requirements; after the Norman Conquest the thegnhood practically embraced the knighthood; the name dropped out of use after Henry II.'s reign, but lasted longer in Scotland.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Thames * Thanet, Isle Of