Antonia

Also Polish, as mentioned before:

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https://en.m.wiktionary.org/wiki/Antonia#Polish
https://www.behindthename.com/name/antonia/top/poland
https://dane.gov.pl/pl/dataset/1667,lista-imion-wystepujacych-w-rejestrze-pesel-osoby-zyjace/resource/54110/table?page=1&per_page=20&q=Antonia&sort=

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Also French: https://meilleursprenoms.com/popularite-prenom/Antonia

Also Romansh:
Source: "Vornamen in der Schweiz. Prénoms en Suisse. I nomi in Svizzera. Prenoms in Svizra" (1993) published by the Association of Swiss registrars
https://sursassiala.ch/2015/01/15/familienforschung/
https://nossaistorgia.ch/entries/AjRVJzawVzv
https://www.portraitarchiv.ch/portrait?page=62
http://www.annalas.ch/persunas/display/q:Antonia

The name Antonia was given to 75 girls born in France in 2019.

Also Luxembourgish: http://engelmann.uni.lu:8080/portal/WBB2009/LWB/wbgui_py?lemid=HK02547
http://www.actioun-letzebuergesch.lu/virnimm.html
You'll find bearers on social media.

Antonia is also Estonian. The name day for Antonia in Estonia is January 12.

Also used in Slovene: https://sl.wikipedia.org/wiki/Antonia

Also Galician: https://gl.wikipedia.org/wiki/Ant%C3%B3n
http://www.ige.eu/igebdt/esq.jsp?idioma=gl&ruta=onomast/nomes.jsp

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

Also Corsican: http://www.corsicami.com/corse%20prenoms/prenoms_corses_m02.htm

Also Polish: https://pl.wikipedia.org/wiki/Antonia_(imi%C4%99)
https://pl.wiktionary.org/wiki/Antonia#pl

Also Aragonese: https://an.wikipedia.org/wiki/Mar%C3%ADa_Antonia_Mart%C3%ADn_Zorraquino

Also Galician: http://www.ige.eu/igebdt/esq.jsp?idioma=gl&ruta=onomast/nomes.jsp
https://gl.wikipedia.org/wiki/Ant%C3%B3n --- "A forma feminina é Antona ou Antonia"

Not used in Poland. [noted -ed]

The name Antonia was given to 264 girls born in the US in 2016.
89.74 percent of people with the first name Antonia are female.
Also Catalan and Finnish.

Also Bulgarian, Croatian and Georgian form of Antonius. [noted -ed]

Also Greek usage (Αντωνία) pronounced: ahn-doh-NEE-ah or ahn-doh-NEE-yah. [noted -ed]

The name Antonia was given to 261 girls born in the US in 2015.

Antonia is also the Slovak form.
Nicknames: Tonis, Tonya, Toni, Toinette, Toinis, Tona, Latonya.