Leith is a distinctive boys' name in United States, ranking #7998 in 2025 with 10 recorded births. This places Leith in the bottom 43% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2018 with 23 births ranking #4431. Since 1996, the popularity has increased by 11.1%. In 2025, approximately 1 in every 170,808 boys born was named Leith. FALLING Recent data shows the name is currently falling.