Synthia is a distinctive girls' name in United States, ranking #7109 in 2012 with 18 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 67.9%. In 2012, approximately 1 in every 97,819 girls born was named Synthia. STABLE Recent data shows the name is currently stable.