Tonja is a distinctive girls' name in United States, ranking #9435 in 2002 with 11 recorded births. The name reached its all-time peak in 2002 with 11 births ranking #9435. Since 1996, the popularity has increased by 83.3%. In 2002, approximately 1 in every 163,347 girls born was named Tonja. FALLING Recent data shows the name is currently falling.