Lyllian is a distinctive girls' name in United States, ranking #9226 in 2002 with 11 recorded births. This places Lyllian in the bottom 49% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2009 with 45 births ranking #3596. In 2002, approximately 1 in every 163,347 girls born was named Lyllian. FALLING Recent data shows the name is currently falling.