Marcellina

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://nossaistorgia.ch/entries/BwKDWmjJZlx
https://www.portraitarchiv.ch/portrait?page=27

This name was also used among the German minority in Bessarabia: https://ofb.genealogy.net/famreport.php?ofb=krasna&ID=I22578&nachname=Bischoff&modus=&lang=de

Also Hungarian: https://hu.wikipedia.org/wiki/Marcella -- mentions Marcellina
http://www.nytud.hu/oszt/nyelvmuvelo/utonevek/osszesnoi.pdf
You'll find several bearers on social media.

This is also the modern Italian form of the name: https://it.wikipedia.org/wiki/Marcellina_(nome).

Marcellina is also used in Hungary.