Rainah \ra(i)-nah\ as a girl's name is a variant of Raina. See for origin and meaning of Rainah.

The baby name Rainah sounds like Raenah and Rinah. Other similar baby names are Dinah, Ainah, Linah, Lannah, Lanah, Binah, Rina, Tinah, Daina, Danah, Dannah, Faina, Ganah, Hannah, Hanah, Jannah, Janah, Jaina, Laina, Rabiah, Rayna, Rafah, Reina, Rainy, Rainey, Rainee, Raine, Rain, Raisa, Raiza, Ramah, Rana, Ranae, Ravina, Raziah, Reannah, Rivah, Ranay, Ranna, Shainah, Sannah, Taina, Zaina and Zaynah.