Jilliann is a distinctive girls' name in United States, ranking #9475 in 2010 with 12 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #6323. Since 1996, the popularity has increased by 71.4%. In 2010, approximately 1 in every 148,111 girls born was named Jilliann. FALLING Recent data shows the name is currently falling.