Synthia is a distinctive girls' name in United States, ranking #5397 in 2003 with 23 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 58.9%. In 2003, approximately 1 in every 79,437 girls born was named Synthia. STABLE Recent data shows the name is currently stable.