Demi-Leigh is a moderately popular girls' name in England & Wales, ranking #403 in 2009 with 105 recorded births. The name reached its all-time peak in 2005 with 120 births ranking #336. Since 1996, the popularity has increased by 169.2%. In 2009, approximately 1 in every 2,985 girls born was named Demi-Leigh. FALLING Recent data shows the name is currently falling.