Agneta

Agneta must have originated from Agnetis, which in Medieval Latin is the genitive of the third declension of Agnes.

This genitive was frequently used as an independent name in the medieval period, possibly due to poor understanding of Latin grammar by the clergy and/or the parents. The Netherlands is with certainty a country where this happened, and it appears that Sweden is as well.

Of course, the aforementioned etymological origin also applies to the names Agnete, Agnetha and Agnethe (all in the main database).

For more information, please see:

- https://www.nordicnames.de/wiki/Agnes (in English; mentions Agnetis twice)
- http://www.nationalarchives.gov.uk/latin/reference/how-to-decline-personal-names/ (in English; specifically mentions Agnetis under "Third declension")
- https://en.wikipedia.org/wiki/Declension_of_Greek_nouns_in_Latin#Declension_of_proper_names_3 (in English; compare how Thales becomes Thaletis)
- https://www.behindthename.com/name/agnetis/submitted (in English)