Complex sentence: The Domesday Book of 1086 records the toponym as "Witehunge" and in Old English "circa" 966--975 as "Weowungum" (dative plural case).
Split into simpler sentences: The Domesday Book of 1086 records the toponym as "Witehunge". The name occurs in Old English "circa" 966--975 as "Weowungum" (dative plural case).