Lyann is a distinctive girls' name in United States, ranking #18907 in 2006 with 5 recorded births. The name reached its all-time peak in 2003 with 14 births ranking #7830. Since 1996, the popularity has decreased by 37.5%. In 2006, approximately 1 in every 380,214 girls born was named Lyann. FALLING Recent data shows the name is currently falling.