That would be a benefactress.
benefactress
There is no grammatical gender in the English noun. The word benefactress may be used for a female benefactor, but it is not necessary except to specify the person's gender, which of course is a form of sexism.
Benefactor is technically gender neutral, but benefactress is a specifically feminine form of the word.
The masculine form of "benefactress" is "benefactor." A benefactor is an individual, typically a person of means, who provides financial support or assistance to a person, organization, or cause. While "benefactress" specifically refers to a female benefactor, "benefactor" is a gender-neutral term that can refer to anyone who provides such support.
The benefactor of the scholarship is unknown.
My uncle was a benefactor for my charity.
The duration of The Benefactor is 3600.0 seconds.
The cast of The Benefactor - 2004 includes: Mark Cuban as Himself - The Benefactor
The antonym of beneficiary is benefactor.
The Benefactor ended on 2004-10-25.
The Benefactor was created on 2004-09-13.
The plural of benefactor is benefactors. As in "the benefactors are wealthy".