Blackbeard and Bayou Teche
If you read enough stuff that was written a good while ago, you will eventually run across the claim that Bayou Teche was named for Edward Teach, the infamous pirate better known as Blackbeard. I most recently came across it in an 1868 piece in the New Orleans Crescent describing the discovery of salt at Avery Island, which was then called Petite Anse Island, for its little wooded coves.