Leith is a distinctive boys' name in United States, ranking #6321 in 2006 with 13 recorded births. The name reached its all-time peak in 2018 with 23 births ranking #4431. Since 1996, the popularity has increased by 44.4%. In 2006, approximately 1 in every 158,086 boys born was named Leith. FALLING Recent data shows the name is currently falling.