In English there are no masculine or feminine forms. English uses gender specific nouns for male or female.
The noun 'patroness' is a word for a female who supports the work of writers, artists, or musicians, most often by giving them money.
The corresponding noun 'patron' is a common gender noun, a word for a person (male or female) who supports the work of writers, artists, or musicians.
The noun 'patron' is also a common gender noun as a word for a regular customer of a business establishment.
Patron
Feminine
The feminine counterpart of "patron" is "patroness."
its masculine no doubt
Masculine
feminine
masculine
La pizarra is feminine, (el) is masculine, and (la) is feminine.
Une école feminine
it is masculine so El
directeur → masculine directrice→ feminine
feminine