Ka is a distinctive girls' name in United States, ranking #5033 in 1998 with 21 recorded births. The name reached its all-time peak in 1996 with 24 births ranking #4376. Since 1996, the popularity has decreased by 12.5%. In 1998, approximately 1 in every 84,138 girls born was named Ka. FALLING Recent data shows the name is currently falling.