Jo is a distinctive girls' name in United States, ranking #4296 in 2016 with 34 recorded births. This places Jo in the top 23% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 58 births ranking #2317. Since 1996, the popularity has decreased by 22.7%. In 2016, approximately 1 in every 52,103 girls born was named Jo. FALLING Recent data shows the name is currently falling.