Jillian is a moderately popular girls' name in United States, ranking #157 in 2009 with 2,041 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has increased by 39.6%. In 2009, approximately 1 in every 900 girls born was named Jillian. FALLING Recent data shows the name is currently falling.