Demi-Leigh is a distinctive girls' name in England & Wales, ranking #591 in 2000 with 45 recorded births. The name reached its all-time peak in 2005 with 120 births ranking #336. Since 1996, the popularity has increased by 15.4%. In 2000, approximately 1 in every 6,071 girls born was named Demi-Leigh. FALLING Recent data shows the name is currently falling.