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Dyllan
BoyMeaning of Dyllan: Welsh: 'son of the sea'
Dyllan is a boy's name most strongly associated with Welsh naming. It has 6 letters and 2 syllables, and it is a genuinely rare and unique choice — 5047th most popular boys' name in the United States in 2025.
US rank 2025
#5047
18 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
3,802
First recorded 1986 · peak 1999
Trend
falling
Style: rare
Popularity over time
Gender split
87% boys · 13% girls, based on US, UK and international usage.
Origins & cultures
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