Synthia is a distinctive girls' name in United States, ranking #7390 in 2011 with 17 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 69.6%. In 2011, approximately 1 in every 103,459 girls born was named Synthia. STABLE Recent data shows the name is currently stable.