Llewelyn is a distinctive boys' name in United States, ranking #10391 in 2019 with 7 recorded births. This places Llewelyn in the bottom 26% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2024 with 23 births ranking #4495. In 2019, approximately 1 in every 256,194 boys born was named Llewelyn. RISING Recent data shows the name is currently rising.