no-name vs unknown

no-name

adj
  • Lacking a recognizable name, identity, or reputation; not noteworthy. 

  • They went with a no-name shop on the edge of town. 

noun
  • Someone or something lacking a recognizable name, identity, or reputation. 

unknown

adj
  • Not known; unidentified; not well known. 

noun
  • A variable (usually x, y or z) whose value is to be found. 

  • A person of no identity; a nonentity 

  • Any thing, place, or situation about which nothing is known; an unknown fact or piece of information. 

How often have the words no-name and unknown occurred in a corpus of books? (source: Google Ngram Viewer )