The freelancer uniform of pajamas and workout clothes may be a stereotype we’re all familiar with, but a few hundred years ago, freelancers dressed for work in far different attire: suits of armor.

“Freelancer” was once used to describe a “medieval mercenary warrior.” There’s a career ancestry to brag about. Or not. It probably depends on your personality.

Where Did the Word ‘Freelance’ Come From? – Alyssa Hertig, Contently (5 November 2014)

Read the full piece which includes the book the word freelancer was probably coined in.