Ainslie is a distinctive girls' name in United States, ranking #4307 in 2010 with 34 recorded births. The name reached its all-time peak in 2009 with 40 births ranking #3871. Since 1996, the popularity has increased by 466.7%. In 2010, approximately 1 in every 52,274 girls born was named Ainslie. FALLING Recent data shows the name is currently falling.