urn

An  urn  is used to store the ashes of cremated people, however URN  is an abbreviation for Uniform Resource Name, specified as a kind of URI, yet later abandoned by the URL Standard (which also deprecates URI & IRI), and historically often a source of dead links, ironically aligned with the original common noun.

History
At some point (citation and date-range needed) URN was part of three pieces of naming / identifying / locating things on the internet:
 * URI = URL + URN

Before that there was proposal to use the term URC (Uniform Resource Characteristics)
 * See: https://tools.ietf.org/html/draft-ietf-uri-urn2urc-00

Even older than that, Tim Berners-Lee had proposed the term UDI (Universal Document Identifier).
 * See: How URL started as UDI for details and more links