Rainbow \ra(in)-bow\ as a girl's name is pronounced RAYN-boh. It is of English origin. The phenomenon as a name. Biblical: the rainbow is a symbol of the covenant between God and Noah, that God will sustain his people. It is also seen as a symbol of hope and of ethnic and gender-preference tolerance. Comedian/actor Richard Pryor's daughter, Rain. See also Iris.

Rainbow has 1 variant form: Rain.