The name Thoreau is a boy's name of French origin. Thoreau and is often added to lists like Unique Baby Names: Unusual and Rare and discussed in our forums with posts like "Love, Like, Lose... Name Game- BOYS".
From the experts:
This unique baby name evokes the calm and tranquility of Henry David Thoreau's Walden Pond. While Thoreau does not have a specific meaning, sources say it's related to the names Terry, Thierry, Theodore, and Thor, which may mean "ruler of the people" or (in the case of the mythological Thor) "thunder".