Ally is a distinctive girls' name in United States, ranking #674 in 2011 with 419 recorded births. The name reached its all-time peak in 1998 with 636 births ranking #417. Since 1996, the popularity has increased by 430.4%. In 2011, approximately 1 in every 4,198 girls born was named Ally. FALLING Recent data shows the name is currently falling.