giver
Refers to a person who gives something; somewhat formal or literary. In everyday speech, くれる人 or あげる人 are more common depending on direction.
The giver of this award wishes to remain anonymous.
The name of the giver of the gift was not written.
Compound of 与え (continuative form of 与える 'to give') and 主 ('master', 'owner', 'person in charge'). The exact historical derivation is uncertain, but the word follows a common pattern for agent nouns.