renegade

noun

1. An outlaw or rebel.
2. A disloyal person who betrays or deserts a cause, religion, political party, friend, etc.

verb

1. (dated)To desert one's cause, or change one's loyalties; to commit betrayal.

   “The recent arrangement, obtained by Lord Stratford, as to the case of a Christian renegading to Mohammedanism […]”

adj

1. Deserting, treacherous, disloyal.
2. (broadly)Unconventional, unorthodox.