forty-eighter

noun2

1. •
   (historical) A European who participated in or supported the Revolutions of 1848.

   • The Wisconsin Republicans sought to placate the Germans by nominating the forty-eighter Karl Roeser as state treasurer. — 2001
2. •
   (historical) An early participant of the California Gold Rush, arriving in California in 1848.

   • The forty-eighters were already in California when the gold rush of forty-nine brought thousands of people […] — 2008