Fabiana

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

Also Corsican: https://www.corsenetinfos.corsica/Fabiana-Giovannini-nous-serrer-tous-les-coudes-pour-apporter-a-l-Office-de-l-Habitat-le-calme-l-attention-et-le-travail_a42840.html

Also occasionally used in Romania (you'll find bearers on social media).

Also Polish: https://pl.wikipedia.org/wiki/Fabiana
https://pl.wiktionary.org/wiki/Fabiana#pl

Also Kashubian: https://pl.wiktionary.org/wiki/Indeks:Kaszubski_-_Imiona
https://csb.wikipedia.org/wiki/20_st%C3%ABcznika

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

Fabiana is the 11th most popular name in Naples in 2004. It is not much used in other parts of Italy.