libertarian

 
Pronunciation: /ˌlɪbəˈtɛːrɪən/

noun

  • 1an adherent of libertarianism: [as modifier]: libertarian philosophy
  • a person who advocates civil liberty.
  • 2a person who believes in free will.

Origin:

late 18th century (in libertarian (sense 2)): from liberty, on the pattern of words such as unitarian