More on Foot-breadth from Infoplease:

• Foot-breadth - Foot-breadth or Quern-biter. The sword of Thoralf Skolinson the Strong, a companion of Hako I. of ...
• Haco - Haco I His sword was called Quern-Biter [foot-breadth ]. (See Sword.) Source: Dictionary of Phrase ...
• Dictionary of Phrase and Fable: F - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "F"