Which preposition to use with benefactress

of Occurrences 6%

I thought, my daughter, that you had descended upon earth in the capacity of a benefactress of men rather than of frogs.

to Occurrences 5%

And you, dear soul, are a benefactress to all.

for Occurrences 1%

Yet now through following his natural bent too far, and yielding to the influence of a remorseless villain, he found his own hands stained with bloodthe blood of a man who, after all, had been his best friend, and had led him to fortune; and the blood of an innocent girl who had not only been his pecuniary benefactress for a time, but had warmed and lighted his house with her beauty and affection.

without Occurrences 1%

She could be employer and benefactress without letting such circumstances deflect in the slightest degree the stream of confidence and affection between her and another.

Which preposition to use with  benefactress