Synthia is a distinctive girls' name in United States, ranking #9665 in 2019 with 11 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 80.4%. In 2019, approximately 1 in every 152,507 girls born was named Synthia. STABLE Recent data shows the name is currently stable.