Ally is a distinctive girls' name in United States, ranking #605 in 2000 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 2000, approximately 1 in every 4,344 girls born was named Ally. FALLING Recent data shows the name is currently falling.