Synthia is a distinctive girls' name in United States, ranking #7708 in 2013 with 16 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 71.4%. In 2013, approximately 1 in every 109,651 girls born was named Synthia. STABLE Recent data shows the name is currently stable.