donor
US /ˈdoʊ.nɚ/
UK /ˈdoʊ.nɚ/

1.
a person who gives something, especially money, to a charity or other organization
:
•
The hospital relies heavily on the generosity of private donors.
•
Many anonymous donors contributed to the relief fund.
a person who gives something, especially money, to a charity or other organization