The term 'NAME UNKNOWN' can be summarized by the crossword solution 'ANON', which is a four-letter word. The term 'ANON' is derived from the Latin phrase 'anno domini' meaning 'in the year of our Lord'. It is commonly used to refer to an anonymous or unknown person, often in the context of literature or other works of art. In modern usage, it is also used to refer to someone whose identity is not known or is being kept secret.