olemus
Wiktionary:
1. the quality or state of being legitimate or valid; validity
2. lawfulness of birth or origin; directness of descent as affecting the royal succession

ülevaateid
https://en.wikipedia.org/wiki/Legitimacy_(criminal_law)

https://en.wikipedia.org/wiki/Legitimacy

https://ejmcm.com/article_2148_98fe834550b211f8e0613dbdbec86480.pdf

https://plato.stanford.edu/entries/legitimacy/

https://web.pdx.edu/~gilleyb/MeaningMeasureofLegitimacyFor72.pdf

https://www.idos-research.de/uploads/media/DP_18.2016.pdf