Sonja is a distinctive girls' name in United States, ranking #2567 in 2017 with 69 recorded births. The name reached its all-time peak in 1998 with 159 births ranking #1179. Since 1996, the popularity has decreased by 51.1%. In 2017, approximately 1 in every 25,013 girls born was named Sonja. FALLING Recent data shows the name is currently falling.