1640s, from Italian viva "(long) live, may he (or she) live," third person singular present subjunctive of vivere "to live," from Latin vivere "to live" (see vital). Probably reborrowed (1836) from Spanish viva, from vivir "to live," from Latin vivere. Sometimes also in Latin form vivat (1660s).[viva etymology, viva origin, 英语词源]