Synthia is a distinctive girls' name in United States, ranking #13047 in 2025 with 7 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 87.5%. In 2025, approximately 1 in every 229,610 girls born was named Synthia. STABLE Recent data shows the name is currently stable.