Clotilda

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/w51DbrwODK7
https://www.portraitarchiv.ch/portrait?page=58

Clo, Cilla, Lottie, Tilly and Tilda could be nicknames.

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

This name was also used among the German minority in Bessarabia: https://ofb.genealogy.net/famreport.php?ofb=krasna&ID=I22716&nachname=Gross&modus=&lang=de