Demi-Leigh is a moderately popular girls' name in England & Wales, ranking #445 in 2004 with 80 recorded births. The name reached its all-time peak in 2005 with 120 births ranking #336. Since 1996, the popularity has increased by 105.1%. In 2004, approximately 1 in every 3,573 girls born was named Demi-Leigh. FALLING Recent data shows the name is currently falling.