Synthia is a distinctive girls' name in United States, ranking #6806 in 2006 with 19 recorded births. The name reached its all-time peak in 1996 with 56 births ranking #2369. Since 1996, the popularity has decreased by 66.1%. In 2006, approximately 1 in every 100,056 girls born was named Synthia. STABLE Recent data shows the name is currently stable.