AWA204 - National Weapons - were nations named after weapons or vice versa?

Scot emailed us this question for Murray to answer; 'Certain tribal confederations, like the Franks & Saxons, typically bear "namesake" weapons (e.g. the Francisca and the Sax). Is the name of the weapon thought to be derived from the name of the confederation, or is the name of the confederation derived from the weapon?'

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