Jonas 2

It's also the French form as well.
https://fr.wikipedia.org/wiki/Jonas
https://nominis.cef.fr/contenus/prenom/3599/Jonas.html
https://meilleursprenoms.com/popularite-prenom/Jonas

Also Portuguese:

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https://www.behindthename.com/name/jonas-2/top/brazil
https://pt.m.wikipedia.org/wiki/Jonas
https://pt.m.wiktionary.org/wiki/Jonas
https://en.m.wiktionary.org/wiki/Jonas#Portuguese
https://forebears.io/forenames/jonas

Also Romansh:
Source: "Vornamen in der Schweiz. Prénoms en Suisse. I nomi in Svizzera. Prenoms in Svizra" (1993) published by the Association of Swiss registrars
https://sursassiala.ch/2015/01/15/familienforschung/

Also used in Modern Greece, variant transcription of Ιωνας.

Also used in the Netherlands. [noted -ed]

Jonas is also the Portuguese form of Jonah.

Jonas is also the Czech form.

Jonas is also Czech and Slovak form.