Thursday appeared dressed as a coppersmith, with a hammer and a copper kettle, as a symbol of his noble descent.
"I am of the highest birth," he said, "paganish, godlike! In the Northern countries I am named after Thor, and in the Southern countries after Jupiter, who both knew how to thunder and lighten, and that has remained in the family!"
Source: http://www.andersen.sdu.dk/vaerk/hersholt/TheDaysOfTheWeek_e.html