Synthie \s(y)-nthie, syn-thie\ as a girl's name is a variant of Cynthia (Greek), and the meaning of Synthie is "from Mount Kynthos".
The baby name Synthie sounds like Synthia, Synthee and Cynthie. Other similar baby names are Syndie, Synthya, Syntheea, Syntha, Kynthia and Cinthie.