English to French Art/Literary Poetry & Literature teenager\\\\\\\'s fantasy

Jinx is the nickname of the hero

what I have found on the Urban Dictionnary is :
1) verb - To unintentionally curse someone or something by talking out loud about bad things that could potentially happen in the near future.
(Similar to the Knock on Wood superstition)

2) noun, exclamation - A game where two people try to be the first to shout "Jinx!" immediately after both people accidentally say the same word at the exact same time in a conversation. The person who says "jinx" first wins, and the loser is either branded unlucky until they win another round in the future, or in some cases, is expected to buy the winner a can or bottle of Coca-Cola.
I asked to the author about the meaning , here is his answer : a person or thing that brings bad luck. Cobe/Jinx brings bad luck to everyone. It is a play on the dog's name Lucky, and it becomes very important later on.
this hero seems to have a pretty bad luck and to have pronounced a curse without being aware of it.

some relevant context so far :
Cobe hated being called Jinx. The only problem, however… Marion was the one calling him by that name.
...
“From now on, I will call you Lucky, and you can call me Jinx. I am tired of Cobe. Time to have a name I can live up to. If I’ve no luck but bad, I will work hard to be the jinx I appear to be.”
...
“You’re such a coward.” Jinx, unsure if he directed the last at himself or the mutt, headed off into the unknown, twanging his mouth harp.
...
Lucky was nowhere to be seen, possibly he made up his mind to run away from Jinx. Being close to him had not brought the couple below much luck. Maybe Jinx was a much more fitting name than Cobe after all.

I wonder if I should translate it by something like "Maudit", but this doesn't take the unvoluntary side of the curse, and totally ignore the game side ( which could be "tchip"); or if I leave both english names but with a footnote explaining the joke.