Leith is a distinctive boys' name in United States, ranking #5431 in 2017 with 17 recorded births. The name reached its all-time peak in 2018 with 23 births ranking #4431. Since 1996, the popularity has increased by 88.9%. In 2017, approximately 1 in every 108,842 boys born was named Leith. FALLING Recent data shows the name is currently falling.