Polhill Anglo-Saxon cemetery but following the collapse of Roman rule in 410 CE, many signs of Romano-British society began to disappear, replaced by those of the ascendant Anglo-Saxon culture. Later Anglo-Saxon accounts attribute this change to the widescale invasion of Germanic language tribes from northern Europe, namely the Angles, Saxons, and Jutes. Archaeological and toponymic evidence shows that there was a great deal of syncretism, with Anglo-Saxon culture interacting and mixing with the Romano-British culture. The Old English term "Kent" first appears in the Anglo-Saxon period, and was based on the earlier Celtic-language name "Cantii". Initially applied only to the area east of
Anglo-Norman literature of Henry IV that English became the native tongue of the kings of England. The language had undergone certain changes which distinguished it from the Old Norman spoken in Normandy, as can be seen from graphical characteristics, from which certain rules of pronunciation are to be inferred. An Anglo-Norman variety of French continued to exist into the early 15th century, though it was in decline at least from the 1360s, when it was deemed insufficiently well known to be used for pleading in court. Great prestige continued to be enjoyed by the French language, however; in the late 14th century,