Jo is a distinctive girls' name in United States, ranking #4208 in 2019 with 34 recorded births. The name reached its all-time peak in 1997 with 58 births ranking #2317. Since 1996, the popularity has decreased by 22.7%. In 2019, approximately 1 in every 49,340 girls born was named Jo. FALLING Recent data shows the name is currently falling.