What does Liv mean? L iv as a girls' name is pronounced liv, leev. It is of Old Norse origin, and the meaning of Liv is defense. Also short form of Olivia. Made familiar by actress Liv Ullman. Actress Liv Tyler. STARTS WITH Li-ASSOCIATED WITH norse. Variations. OTHER FORMS VIA OLIVIA Liva, Livia , Livie, Livvie, Livvy, Olia, Oliva, Olive, Olva