Sarre Anglo-Saxon cemetery 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 the River Medway, by the end of the sixth century it also referred to areas to the west of it. The Kingdom of Kent was the first recorded
Germanic peoples classical source, modern linguists sometimes designate the Frankish language (and its descendant Dutch) as Istvaeonic, although the geographical term "Weser-Rhine Germanic" is often preferred. However, the classical ""Germani"" near the Rhine, to whom the term was originally applied by Caesar, may not have even spoken Germanic languages, let alone a language recognizably ancestral to modern Dutch. The close relatives of Dutch, Low German, Anglo-Saxon and Frisian, are in fact sometimes designated as Ingvaeonic, or alternatively, "North-Sea Germanic". Frankish, (and later Dutch, Luxembourgish and the Frankish dialects of German in Germany) has continuously been intelligible to some extent with both "Ingvaeonic"