Sonja is a distinctive girls' name in United States, ranking #2284 in 2019 with 80 recorded births. The name reached its all-time peak in 1998 with 159 births ranking #1179. Since 1996, the popularity has decreased by 43.3%. In 2019, approximately 1 in every 20,970 girls born was named Sonja. FALLING Recent data shows the name is currently falling.