The usual name
is the name
or names by which a person is known in everyday life. A person may have more than one usual name: one for work, one for friends, one for family, etc. The usual name can be contrasted with the formal name
For example, a man with the full formal name Michael Robert Smith might be known as Michael or Mr. Smith at work, but as Mike, Bob, or Smitty to his friends and family.
See also diminutive.