- The definition of a family name, also called a surname, is a last name to identify the members of a family.
An example of family name is "Obama" to Barack's family.
family name definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- surname (sense )
- a first or middle name that is or was a surname within the family, as the mother's maiden name
family name definition by American Heritage Dictionary