Jillian is a distinctive girls' name in United States, ranking #956 in 2020 with 267 recorded births. The name reached its all-time peak in 2001 with 2,847 births ranking #120. Since 1996, the popularity has decreased by 81.7%. In 2020, approximately 1 in every 6,051 girls born was named Jillian. FALLING Recent data shows the name is currently falling.