An additional component of a surname to distinguish its users from other families of the same surname. So whereas an alias is used nowadays to hide someone's identity, an alias was originally used to clarify identity. As an imaginary example, a member of the Smith family who moved to Exeter might have called themselves Smith Alias Exeter, or Exeter Alias Smith.
In culture:
Alias (TV series), an American television series starring Jennifer Garner.
PowerAnimator, an Alias Systems Corporation program also known as Alias.
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