mid-15c., "to give (something) up," from Old French surrendre "give up, deliver over" (13c.), from sur- "over" (see sur- (1)) + rendre "give back" (see render (v.)). Reflexive sense of "to give oneself up" (especially as a prisoner) is from 1580s. Related: Surrendered; surrendering.
early 15c., in law, "a giving up" (of an estate, land grant, interest in property, etc.), from Anglo-French surrendre, Old French surrendre noun use of infinitive, "give up, deliver over" (see surrender (v.)).