Jillian is a moderately popular girls' name in United States, ranking #286 in 2012 with 1,102 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 24.6%. In 2012, approximately 1 in every 1,598 girls born was named Jillian. FALLING Recent data shows the name is currently falling.