Synthia is a distinctive girls' name in United States, ranking #4433 in 2001 with 28 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 50.0%. In 2001, approximately 1 in every 64,306 girls born was named Synthia. STABLE Recent data shows the name is currently stable.