Jillian is a moderately popular girls' name in United States, ranking #125 in 2002 with 2,734 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has increased by 87.0%. In 2002, approximately 1 in every 657 girls born was named Jillian. FALLING Recent data shows the name is currently falling.