This name is used by Jeffrey Archer in his books 'Kane and Abel', 'The Prodigal Daughter' and 'Shall we tell the President?'.In all three books, Florentyna Kane is a woman with Polish ancestry, but being strong-willed, she continues her father's work and ultimately becomes the President of the U.S.A.
https://www.behindthename.com/name/florentina/top/brazil
https://pt.m.wiktionary.org/wiki/Florentina