Synthia is a distinctive girls' name in United States, ranking #3030 in 1997 with 40 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 28.6%. In 1997, approximately 1 in every 43,516 girls born was named Synthia. STABLE Recent data shows the name is currently stable.