Norsemen called their council the:

Thing.

Explanation:

The thing was the prehistoric assembly of Germanic and Norse councils. It was attended by free men from the community and was led by law readers who were familiar with previously decided laws. Today, the term is used in the name of many political and legal bodies in Northern Europe.

The Things met at regular intervals and elected chiefs and kings, and condemned them according to the laws remembered by the law-readers. In practice, the councils were dominated by the most influential and wealthy, but in theory they operated on a voice and man basis.

Each chief of a Viking village was assisted by a council and decisions were made at a "Thing" or meeting and all free men were allowed to vote.

Explanation:

The Vikings were raiders from Southern Scandinavia who from the 8th century till the 11th century did business across Northern Europe to Iceland, Greenland and Vinland. The VIkings (also known as Norsemen) were expert sailors and had good knowledge of navigational systems. Their homeland was made physically stronger by the inclusion of Denmark, Norway and Sweden.