What is "saint-martin-des-champs"

Saint-Martin-des-Champs is the name of several communes in France, each named for Martin of Tours:

• Saint-Martin-des-Champs, in the Cher département
• Saint-Martin-des-Champs, in the Finistère département
• Saint-Martin-des-Champs, in the Manche département
• Saint-Martin-des-Champs, in the Seine-et-Marne département
• Saint-Martin-des-Champs, in the Yvelines département
• Saint-Martin-des-Champs, in the Yonne département