Lyndsy is a distinctive girls' name in United States, ranking #6936 in 1998 with 14 recorded births. The name reached its all-time peak in 1999 with 17 births ranking #6091. Since 1996, the popularity has increased by 40.0%. In 1998, approximately 1 in every 126,206 girls born was named Lyndsy. FALLING Recent data shows the name is currently falling.