You can use middle name in expressions such as `discretion was her middle name' and `his middle name is loyalty' to indicate that someone always behaves with a great deal of a particular quality. Geniality is my middle name. I rarely write a fierce word about any restaurant. A name that occurs between a person's first name and surname
name that is in addition to the first name used by everyone, additional name given to a baby and appears in the birth certificate; nickname which describes the person in a precise manner