Saturnina

Also Portuguese:

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https://www.behindthename.com/name/saturnina/top/brazil
https://pt.m.wiktionary.org/wiki/Saturnina

Saturnina is also Polish and Lithuanian. The name days for Saturnina in Poland are October 31 and November 29.

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Source: https://forebears.io/x/forenames/saturnina

Also Polish: https://pl.wikipedia.org/wiki/Saturnina
https://pl.wikipedia.org/wiki/Saturnina_Wadecka

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

Saturnina is also used in Italian and Polish, though in both languages the name is considerably rare.