Saxon ONE' Saxon ONE is a term used to refer to the Anglo-Saxon period of British history, which lasted from the 5th century to the 11th century. The term 'Saxon ONE' is derived from the Germanic tribe of Saxons who invaded Britain during this period and established the foundations of the English language and culture. The term 'EINS' is the German word for 'ONE', thus making 'Saxon ONE' an appropriate name for this period of British history.