Jillian is a distinctive girls' name in United States, ranking #787 in 2019 with 353 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 75.9%. In 2019, approximately 1 in every 4,752 girls born was named Jillian. FALLING Recent data shows the name is currently falling.