Ilsa \i-lsa, il-sa\ as a girl's name is a variant of Elizabeth (Hebrew), Elsa (Hebrew) and Ilse (German), and the meaning of Ilsa is "God's promise; God is my oath".

The baby name Ilsa sounds like Ilysa, Ilsae, Illsa and Ilisa. Other similar baby names are Ila, Ilka, Illa and Isa.