Ally is a distinctive girls' name in United States, ranking #685 in 2010 with 418 recorded births. The name reached its all-time peak in 1998 with 636 births ranking #417. Since 1996, the popularity has increased by 429.1%. In 2010, approximately 1 in every 4,252 girls born was named Ally. FALLING Recent data shows the name is currently falling.