Tonja is a distinctive girls' name in United States, ranking #12344 in 1998 with 7 recorded births. The name reached its all-time peak in 2002 with 11 births ranking #9435. Since 1996, the popularity has increased by 16.7%. In 1998, approximately 1 in every 252,413 girls born was named Tonja. FALLING Recent data shows the name is currently falling.