Jillian is a distinctive girls' name in United States, ranking #1011 in 2021 with 253 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 82.7%. In 2021, approximately 1 in every 6,481 girls born was named Jillian. FALLING Recent data shows the name is currently falling.