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Dillan
BoyMeaning of Dillan: Welsh: 'son of the sea'
Dillan is a boy's name most strongly associated with Welsh naming. It has 6 letters and 2 syllables, and it is familiar but far from overused — 3115th most popular boys' name in the United States in 2025 and 2443rd in England & Wales.
US rank 2025
#3115
37 babies in 2025
England & Wales 2024
#2443
9 babies in 2024
US babies since 1880
7,387
First recorded 1975 · peak 1992
Trend
falling
Style: uncommon
Popularity over time
Gender split
95% boys · 5% girls, based on US, UK and international usage.
Origins & cultures
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