Margita

Also (Lower) Sorbian: https://dsb.wikipedia.org/wiki/Margita_Heinrichowa

Also Banatswabian: https://ofb.genealogy.net/famreport.php?ofb=werschetz&ID=I81286&nachname=Altst%C3%A4tter&modus=&lang=de

Also occasionally used in Serbian as a variant of the Hungarian form "Margit."

Also Croatian: https://actacroatica.com/en/name/Margita/

Also Slovene: https://sl.wikipedia.org/wiki/Margita_(ime)

Also Croatian usage.

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

Also Latvian: https://www.pmlp.gov.lv/lv/sakums/statistika/personvardu-datu-baze/?id=137&query=Margita.