Lief is a distinctive boys' name in United States, ranking #13784 in 2008 with 5 recorded births. This places Lief in the bottom 6% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 12 births ranking #5528. In 2008, approximately 1 in every 407,989 boys born was named Lief. RISING Recent data shows the name is currently rising.