Kaja is a distinctive girls' name in United States, ranking #6973 in 2025 with 16 recorded births. This places Kaja in the top 40% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 25 births ranking #5620. Since 1996, the popularity has increased by 60.0%. In 2025, approximately 1 in every 100,454 girls born was named Kaja. FALLING Recent data shows the name is currently falling.