Synthia is a distinctive girls' name in United States, ranking #9864 in 2017 with 11 recorded births. This places Synthia in the bottom 47% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 80.4%. In 2017, approximately 1 in every 156,898 girls born was named Synthia. STABLE Recent data shows the name is currently stable.