olemus
(1) rahvajutt, näiteks linnalegend
Wiktionary:
1. an unrealistic story depicting past events

(2) mündikiri või muu analoogiline objektikiri
Wiktionary:
4. (numismatics, heraldry) an inscription, motto, or title, especially one surrounding the field in a medal or coin, or placed upon a heraldic shield or beneath an engraving or illustration
https://fthmb.tqn.com/Lxk2VMkqtS_acof4rp-rF3z64C4=/960x0/filters:no_upscale()/Legend-Motto-Denomination-Country-Parts-of-a-Coin-569441c85f9b58eba495347d.jpg

(3) seletustekst kaardil, skeemil, diagrammil
Wiktionary:
3. a key to the symbols and color codes on a map, chart, etc
http://gisgeography.com/wp-content/uploads/2016/05/Map-Example-Legend.png

(4) isiku võltstaust, mida kasutatakse spionaažis
Wiktionary:
4. a fabricated backstory for a spy, with associated documents and records
Synonym: cover story
According to his legend, he once worked for the Red Cross, spreading humanitarian aid in Africa.