Siddeny \s(i)-dde-ny\ as a girl's name is a variant of Sidney (Old English), and the meaning of Siddeny is "wide meadow".

The baby name Siddeny sounds like Sideny and Sidony. Other similar baby names are Aiden, Cidney, Sinny, Saidey, Sidni, Sidaine, Siena, Signy, Sirena, Sirene, Sireena, Sivney, Sydney and Sidnee.