Joi is a distinctive girls' name in United States, ranking #1836 in 1999 with 87 recorded births. The name reached its all-time peak in 2001 with 119 births ranking #1564. Since 1996, the popularity has increased by 14.5%. In 1999, approximately 1 in every 20,388 girls born was named Joi. FALLING Recent data shows the name is currently falling.