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Gender: F Origin of Rainbow: Word name

Colorful, yes, but also probably among the dippiest of hippie names. Holly Madison recently chose it for her little girl.

Famous People Named Rainbow

Rainbow Aurora Rotella, daughter of model Holly Madison
Rainbow Rowell, American novelist
Rainbow Alexander, wife of pro skateboarder Paul Rodriguez

Pop Culture References for the name Rainbow

Dr. Rainbow Johnson, character on TV's "Black-ish"
Rainbow, character in the "Ingo" books by Helen Dunmore
Rainbow Brite, titular character of the franchise "Rainbow Brite"

Reignbo, Reignbow, Rainbeau, Rainbo, Reignbeau, Rainboe, Reignboe