Delfina

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

Also Sicilian: https://scn.wikipedia.org/wiki/Noma_siciliani

Also Corsican: http://www.corsicami.com/corse%20prenoms/prenoms_corses_m11.htm

Also Polish: https://pl.wikipedia.org/wiki/Delfina_(imi%C4%99)
https://pl.wiktionary.org/wiki/Delfina

Also Galician: 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

Also Polish.

In 2018 were born in Italy 5 babies called Delfina. In these years the highest peak of popularity was in 2002 when were born 11 Delfina.