Synthia is a distinctive girls' name in United States, ranking #10073 in 2014 with 11 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 80.4%. In 2014, approximately 1 in every 162,358 girls born was named Synthia. STABLE Recent data shows the name is currently stable.