Jonai is a distinctive girls' name in United States, ranking #11474 in 2001 with 8 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6188. Since 1996, the popularity has increased by 14.3%. In 2001, approximately 1 in every 225,070 girls born was named Jonai. FALLING Recent data shows the name is currently falling.