Original sentence: The "northern Suebi" were mentioned in 569 under Frankish king Sigebert I in areas of today's Saxony-Anhalt which were known as Schwabengau or Suebengau at least untill the 12th century
Edited sentence: The "northern Suebi" were mentioned in 569 under Frankish king Sigebert I in areas of today's Saxony-Anhalt which were known as Schwabengau or Suebengau at least until the 12th century