Leontina

Leontina is also used in Portuguese. [noted -ed]

Also Romansh: https://rm.wikipedia.org/wiki/Leontina_Lergier-Caviezel
https://nossaistorgia.ch/entries/zj2D2ynWV6a
https://nossaistorgia.ch/entries/A39DB2bJDNY
https://www.portraitarchiv.ch/portrait?page=70

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

Leontina is also Lithuanian. The name day for Leontina in Lithuania is April 19.

Also Czech: https://cs.wikipedia.org/wiki/Leontina

Also Romanian: https://ro.wikipedia.org/wiki/Leontina_Costea

Also Hungarian: https://hu.wikipedia.org/wiki/Leontina
http://www.nytud.hu/oszt/nyelvmuvelo/utonevek/osszesnoi.pdf
You'll find numerous bearers on social media and in genealogies.

Leontina is also the Czech form.