Lillia is a moderately popular girls' name in England & Wales, ranking #419 in 2007 with 98 recorded births. The name reached its all-time peak in 2007 with 98 births ranking #419. Since 1996, the popularity has increased by 3,166.7%. In 2007, approximately 1 in every 3,124 girls born was named Lillia. FALLING Recent data shows the name is currently falling.