Which letter is associated with the name Mary?

The letter associated with the name Mary is M because it is the first letter of the name "Mary." This association is often used in various contexts, such as phonetic alphabets, where each letter corresponds to a name or word to aid in clarity during communication. For instance, in the NATO phonetic alphabet, "M" is represented by "Mike," but the principle remains that "M" clearly identifies the name Mary due to its initial letter. Thus, the connection is straightforward: "Mary" starts with "M," making it the correct answer.