Gwilym is a distinctive boys' name in England & Wales, ranking #1359 in 2025 with 20 recorded births. This places Gwilym in the top 22% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2015 with 23 births ranking #1159. Since 1996, the popularity has increased by 53.8%. In 2025, approximately 1 in every 13,597 boys born was named Gwilym. RISING Recent data shows the name is currently rising.