Jilliann is a distinctive girls' name in United States, ranking #10290 in 2009 with 11 recorded births. The name reached its all-time peak in 2000 with 17 births ranking #6323. Since 1996, the popularity has increased by 57.1%. In 2009, approximately 1 in every 166,988 girls born was named Jilliann. FALLING Recent data shows the name is currently falling.