Deian is a distinctive boys' name in England & Wales, ranking #3684 in 2025 with 5 recorded births. This places Deian in the bottom 40% of ranked UK boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 10 births ranking #1953. Since 1996, the popularity has increased by 66.7%. In 2025, approximately 1 in every 54,387 boys born was named Deian. RISING Recent data shows the name is currently rising.