Llewelyn is a distinctive boys' name in United States, ranking #13265 in 2015 with 5 recorded births. This places Llewelyn 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 2024 with 23 births ranking #4495. In 2015, approximately 1 in every 383,252 boys born was named Llewelyn. RISING Recent data shows the name is currently rising.