Stefani

This name is also the Brazilian Portuguese form of Stephanie and a variant of Estefânia.
https://www.behindthename.com/name/estefa13nia
https://www.behindthename.com/name/stefani/top/brazil
https://www.popular-babynames.com/name/stefani
https://forebears.io/x/forenames/stefani

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Source:
https://censo2010.ibge.gov.br/nomes/
(Just type "Stefani" in the name entry box and see!)

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Also a Greek variant of Stefania.
https://www.behindthename.com/name/stefania
https://en.wikipedia.org/wiki/Stefani_Bismpikou

Can also be an Italian variant of Stephanie https://en.m.wikipedia.org/wiki/Stefani_(name)

Also Banatswabian: https://ofb.genealogy.net/famreport.php?ofb=zichydorf&ID=I29517&nachname=Anheuer&modus=&lang=de