Tiundaland
Tiundaland is a historic region, Folkland, and since 1296 part of the modern province of Uppland.
It originally meant the land of the ten hundreds and referred to its duty of providing 1000 men and 40 ships for the Swedish king's leidang.
During the Viking Age it probably extended from the coast of the Baltic Sea by Norrtälje to the bay which today is the lake Mälaren.
According to Snorri Sturluson in the Heimskringla it was the location of Uppsala and the Thing of all Swedes, where every year there were great blóts which were attended by many kings.
He relates that Tiundaland was the richest and most fertile region of Sweden where was the seat of the Swedish kings at Uppsala, the Swedish Archbishopric and from which Uppsala öd had taken its name.
red = Tiunda
cyan = Attunda
yellow = Roden
green = Fjärdhundra
The coast line has changed considerably in the last millennium due to Post-glacial rebound . Originally there was a sea bay coming in from the north all the way into Uppsala