Jilliann is a distinctive girls' name in United States, ranking #9369 in 1997 with 9 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #6323. Since 1996, the popularity has increased by 28.6%. In 1997, approximately 1 in every 193,407 girls born was named Jilliann. FALLING Recent data shows the name is currently falling.