Nonah \n(o)-nah\ as a girl's name is a variant of Nona (Latin), and the meaning of Nonah is "ninth".

The baby name Nonah sounds like Nonnah, Nonie, Nina, Nana, Neenah, Nyna, Neneh, Nena, Nonna and Noni. Other similar baby names are Oonah, Norah, Monah and Yonah.