Jonai is a distinctive girls' name in United States, ranking #7772 in 2000 with 13 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6188. Since 1996, the popularity has increased by 85.7%. In 2000, approximately 1 in every 139,690 girls born was named Jonai. FALLING Recent data shows the name is currently falling.