Giver

wiktionary

ref

From Middle English gevar, gyffare, variants (due to English given(“to give”)) of Middle English yevere, ȝevere, ȝyvere, equivalent to give +‎ -er. Cognate with German Geber(“donor”).

etymonline

ref

giver (n.)

mid-14c., from give (v.) + -er (1). Old English agent-noun forms were giefend, giefa.