Synthia is a distinctive girls' name in United States, ranking #4174 in 2000 with 30 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 46.4%. In 2000, approximately 1 in every 60,532 girls born was named Synthia. STABLE Recent data shows the name is currently stable.