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Home › Baby Names Directory › Dillyn

Dillyn

♂ Boy

How to Pronounce Dillyn

Pronounced DIL-in /ˈdɪl.ɪn/Medium

Meaning: Dillyn is a modern respelling of Dylan, a Welsh name usually explained as dy ('great') plus llanw ('sea, flow'), understood as 'son of the sea' after a figure in Welsh legend. The -illyn spelling is a phonetic restyling; the meaning is inherited whole from Dylan.Medium

In 30 seconds: Dillyn is a modern respelling of Dylan, Welsh for 'son of the sea.' It appeared in the nineties and stayed rare (say DIL-in).
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Origin MediumWelsh, English
MeaningDillyn is a modern respelling of Dylan, a Welsh name usually explained as dy ('great') plus llanw ('sea, flow'), understood as 'son of the sea' after a figure in Welsh legend. The -illyn spelling is a phonetic restyling; the meaning is inherited whole from Dylan.
U.S. rank (2023)#12688 ↘ Falling
2023 U.S. births5 boys (0.00% of U.S. boys)
Peak year1999
Total births (all-time)≈ 412

Popularity in the U.S. · SSA data

peak 199919912023

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Dillyn is a modern American respelling of Dylan, the Welsh 'son of the sea.' It appears in United States records from about 1991, riding the strong popularity of Dylan itself, and reached its small high near 1999. Even so, it was given to only a couple dozen boys a year, so this spelling stayed rare.

A boy named Dillyn near that late-nineties high is a young adult today, squarely in the Dylan generation. It is not a revival but a variant, and it is unlikely to overtake the standard Dylan; parents who love the sound almost always default to the familiar spelling.

Did you know? Dillyn takes the sea-born Welsh name Dylan and rewrites it with a double L and a -yn ending, one of many creative spellings that trailed Dylan up the charts.
Overall data confidence 40%
References - Dillyn — Respelling of Dylan; Welsh 'son of the sea' inherited; modern spelling variant.

Variations

DylanDillonDylon

Nicknames

DillDilly

Famous Bearers

  • Famous bearers coming soon.

If you like Dillyn…

Dylan— the standard parent name this respells
Dillon— a common alternate spelling of Dylan
Kellan— a like modern Celtic-flavored boys' name
Declan— a same-era Irish-Welsh sounding favorite

Explore names like Dillyn

By thememodernrarevariant-spellingwelsh

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Frequently Asked

What does the name Dillyn mean?

It is a modern respelling of Dylan, a Welsh name meaning 'son of the sea.'

How do you pronounce Dillyn?

It's said DIL-in /ˈdɪl.ɪn/, two syllables, stress on the first.

Is Dillyn a boy or girl name?

Dillyn is used as a boy's name.

How popular is Dillyn?

It has always been rare, an alternate spelling of Dylan given to only a couple dozen boys a year even at its high in the late nineteen-nineties.

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