Lyann is a distinctive girls' name in United States, ranking #7513 in 1999 with 13 recorded births. The name reached its all-time peak in 2003 with 14 births ranking #7830. Since 1996, the popularity has increased by 62.5%. In 1999, approximately 1 in every 136,445 girls born was named Lyann. FALLING Recent data shows the name is currently falling.