Lyssi \l(ys)-si\ as a girl's name is a variant of Elizabeth (Hebrew), and the meaning of Lyssi is "God's promise; God is my oath".

The baby name Lyssi sounds like Lyssa, Lyssie and Lissi. Other similar baby names are Lissa, Lissie, Assi, Kassi, Cassi, Lissy, Lyse, Lysa, Jessi, Lassie, Lesli, Lynzi, Nyssa, Cissi and Tessi.