Jonah

noun2

1. •
   (slang) A person who brings a ship bad luck.

   • Superstitious sailors regarded a clergyman as an unlucky shipmate, a Jonah whose presence would never be welcome. — 2008
2. •
   (slang) Any person or object which is deemed to cause bad luck; a jinx.

   • ‘My first agent, and he's dead. It's incredible. I feel like a complete Jonah.’ — 1979