Possible Clues:

• City known as a center of Cajun culture
• Marquis de --, 1757-1834, French soldier and revolutionary
• Scientologist Ron Hubbard's first name
• Close friend of Hamilton, in 'Hamilton'
• Town in Indiana or Louisiana
• Liberal arts college in the Keystone State
• -- Ronald Hubbard (L. Ron Hubbard), founder of the Church of Scientology
• Honorary American citizen
• Revolutionary still imprisoned by the French lot
• French soldier in the American Revolution