Jilliann is a distinctive girls' name in United States, ranking #6323 in 2000 with 17 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #6323. Since 1996, the popularity has increased by 142.9%. In 2000, approximately 1 in every 106,822 girls born was named Jilliann. FALLING Recent data shows the name is currently falling.