Synthia \s(y)-nthia, syn-thia\ as a girl's name is a variant of Cynthia (Greek), and the meaning of Synthia is "from Mount Kynthos".
The baby name Synthia sounds like Synthya, Synthie and Syntha. Other similar baby names are Kynthia, Anthia, Syntheea, Synthee, Cyntia, Cynthya, Cynthie, Cynthea, Cinthia, Janthia, Ianthia, Panthia, Sanchia and Xanthia.