Ronja

Also German:

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https://www.beliebte-vornamen.de/4821-ronja.htm
https://www.behindthename.com/name/ronja/top/germany-berlin
https://de.m.wikipedia.org/wiki/Ronja
https://en.m.wiktionary.org/wiki/Ronja#German
https://de.m.wikipedia.org/wiki/Ronja_Bichsel
https://de.m.wikipedia.org/wiki/Ronja_Stern
https://de.m.wikipedia.org/wiki/Ronja_Forcher
https://de.m.wikipedia.org/wiki/Ronja_Eibl

Also Norwegian, Danish and Icelandic: https://www.nordicnames.de/wiki/Ronja

Ronja is also Finnish. The name day for Ronja in Finland is February 4. [noted -ed]

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Sources: https://www.names.org/n/ronja/about
https://forebears.io/x/forenames/ronja
https://fi.m.wikipedia.org/wiki/Ronja
https://almanakka.helsinki.fi/en/name-days/name-day-search.html

Also Finnish name. Finnish name day February 4.
https://fi.wikipedia.org/wiki/Ronja
https://almanakka.helsinki.fi/en/name-days/name-day-search.html

Also used in Estonia: https://et.wikipedia.org/wiki/Ronja
https://www.stat.ee/public/apps/nimed/

Ronja is also used in Finland - another thing is that it's a very yong name - Ronja got popular in 80's-90's and it's popularity seems to be still growing.
The Finnish (official) name day is on 4.2.