Lillyan is a distinctive girls' name in United States, ranking #5348 in 1999 with 20 recorded births. The name reached its all-time peak in 2009 with 193 births ranking #1265. Since 1996, the popularity has increased by 300.0%. In 1999, approximately 1 in every 88,689 girls born was named Lillyan. FALLING Recent data shows the name is currently falling.