Jillian is a distinctive girls' name in United States, ranking #574 in 2017 with 525 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 64.1%. In 2017, approximately 1 in every 3,287 girls born was named Jillian. FALLING Recent data shows the name is currently falling.