Ally is a distinctive girls' name in United States, ranking #670 in 2003 with 394 recorded births. The name reached its all-time peak in 1998 with 636 births ranking #417. Since 1996, the popularity has increased by 398.7%. In 2003, approximately 1 in every 4,637 girls born was named Ally. FALLING Recent data shows the name is currently falling.