Jyllian is a distinctive girls' name in United States, ranking #13189 in 1998 with 6 recorded births. This places Jyllian in the bottom 21% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2001 with 23 births ranking #5085. In 1998, approximately 1 in every 294,482 girls born was named Jyllian. FALLING Recent data shows the name is currently falling.