The most common and most likely answer to this crossword clue is the 9 letter word ANONYMOUS which also is the latest solution we found used in New York Times in 1967.
Of unknown source crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters |
|---|---|---|
| ANONYMOUS | 100 % | 9 |
Words with a meaning similar to the clue: Of unknown source
These words may or may not be a possible solution to this crosswords clue.- unnamed
- anonymous
- unidentified
- nameless
- anon
- book
- hazard
- original
- root
- roots
- rumor
- someone
Crossword Answer definitions
ANONYMOUS adjective- Lacking a name; not named, for example an animal not assigned to any species.
- Without any name acknowledged of a person responsible
- Of unknown name; whose name is withheld
- Lacking individuality.
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution