Serena

Also of French usage alongside Séréna. Both the accented and unaccented versions began to appear in France's INSEE in 2010 onwards.
https://www.behindthename.com/name/serena/top/france
https://www.behindthename.com/name/se10re10na

Also Dutch: https://nvb.meertens.knaw.nl/naam/is/Serena

Also Romanian. You'll find bearers on social media.

Also Gascon: https://ieo-oc.org/spip.php?page=article&id_article=300 --- Source: Institut d'Estudis Occitans

Also Banatswabian: https://ofb.genealogy.net/famreport.php?ofb=zichydorf&ID=I16427&nachname=Prodam&modus=&lang=de

Also Galician: https://gl.wikipedia.org/wiki/Lista_de_nomes_femininos_en_galego#H
http://www.ige.eu/igebdt/esq.jsp?idioma=gl&ruta=onomast/nomes.jsp

Also Corsican: https://cronicadiacorsica.pagesperso-orange.fr/Repertoire/RepertoireR.html

Also Polish: https://pl.wikipedia.org/wiki/Serena
https://pl.wiktionary.org/wiki/Serena

This name is used in Portuguese too.

Serena appeared on the top 1000 list in the 1890's to the 1900's. It came back on the top 1000 list in the 1960's. Its most popular year was 2003 where it ranked 259.