Jilliann is a distinctive girls' name in United States, ranking #10786 in 1999 with 8 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #6323. Since 1996, the popularity has increased by 14.3%. In 1999, approximately 1 in every 221,723 girls born was named Jilliann. FALLING Recent data shows the name is currently falling.