Synthia is a distinctive girls' name in United States, ranking #7063 in 2007 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 2007, approximately 1 in every 101,181 girls born was named Synthia. STABLE Recent data shows the name is currently stable.