What is a middle initial?

A middle initial is a letter that represents a person's middle name or, in some cases, a second given name. It is used to differentiate individuals who may have the same first and last names. Middle initials are commonly used on legal documents, formal correspondence, and official records. Some people choose to use their middle initial as part of their professional identity or as a way to distinguish themselves from others with the same name. Middle initials are not always required, but they can add a sense of formality and distinction to a person's name.