Ainslie is a distinctive girls' name in United States, ranking #7749 in 2008 with 16 recorded births. The name reached its all-time peak in 2009 with 40 births ranking #3871. Since 1996, the popularity has increased by 166.7%. In 2008, approximately 1 in every 118,170 girls born was named Ainslie. FALLING Recent data shows the name is currently falling.