Giulia is one of the most common female names in Italy and has been for at least 30 years. There were three girls named Giulia in my class in high school. Once I also knew a German girl (with no Italian ancestry) named Giulia and this name is quite common in France, Switzerland, Belgium and the Netherlands too.
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/lqYVy4GZeAG
https://nossaistorgia.ch/entries/j4gVkoqVYAp
https://www.portraitarchiv.ch/portrait?page=55