Kadia \k(a)-dia\ as a girl's name is a variant of Kady (American). See for meaning of Kadia.
The baby name Kadia sounds like Kadie, Kadi and Kadiya. Other similar baby names are Katia, Kasia, Kacia, Kadian, Kaia, Kalia, Kazia, Kadija, Nadia and Sadia.