Jonai is a distinctive girls' name in United States, ranking #10265 in 2004 with 10 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6188. Since 1996, the popularity has increased by 42.9%. In 2004, approximately 1 in every 183,612 girls born was named Jonai. FALLING Recent data shows the name is currently falling.