Jillian is a distinctive girls' name in United States, ranking #518 in 2016 with 602 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 58.8%. In 2016, approximately 1 in every 2,943 girls born was named Jillian. FALLING Recent data shows the name is currently falling.