Kaja is a distinctive girls' name in United States, ranking #8350 in 2019 with 13 recorded births. The name reached its all-time peak in 2009 with 25 births ranking #5620. Since 1996, the popularity has increased by 30.0%. In 2019, approximately 1 in every 129,044 girls born was named Kaja. FALLING Recent data shows the name is currently falling.