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The short answer
Dylan is a Welsh name used mainly for boys and occasionally for girls. Behind the Name derives it from the Welsh prefix dy, "to, toward", and llanw, "tide, flow"; Wikipedia reads dy as "great" and gives "great tide" or "son of the sea" as translations, so the second element is agreed but the first is not. In the Fourth Branch of the Mabinogi, Dylan is a son of Arianrhod who takes to the sea immediately after his baptism and swims as well as a fish. The name spread beyond Wales after the poet Dylan Thomas (1914–1953) and the musician Bob Dylan, who took his stage name from the poet. In 2025 it ranked #41 for boys and #808 for girls in the United States.
Meaning and etymology
Both sources trace the name to Welsh and agree on its second element. Behind the Name gives it "from the Welsh prefix dy meaning 'to, toward' and llanw meaning 'tide, flow'." Wikipedia states that "it is derived from the Welsh words 'dy,' meaning 'great,' and 'llanw,' meaning 'tide' or 'sea'," and offers the translations "son of the sea", "born from the ocean" and "great tide". The disagreement over dy ("to, toward" against "great") is why this profile marks the etymology as likely rather than established. Behind the Name adds that, according to some theories, the mythological Dylan might be rooted in an earlier and otherwise unattested Celtic god of the sea.
Editorial confidence: likely
Linguistic roots
| Language | Form | Meaning |
|---|---|---|
| Welsh | dy | "to, toward" (Behind the Name) or "great" (Wikipedia) |
| Welsh | llanw | tide, flow; Wikipedia also gives "sea" |
Competing or overlapping origins
- Behind the Name and Wikipedia disagree on the first element: Behind the Name reads dy as a prefix meaning 'to, toward', Wikipedia as 'great'. Both agree that llanw means 'tide'. The popular glosses 'son of the sea' and 'born from the ocean' appear only in Wikipedia and are translations of the sense rather than of the two elements.
- Behind the Name reports that some theories root the mythological character in an earlier, otherwise unattested Celtic sea god; this is presented as a theory, not an established origin.
- Wikipedia treats Dillon as a related name rather than a spelling variant; Behind the Name lists Dillan and Dillon as English variants of Dylan.
History of the name
The name's earliest attestation in the sources is mythological. Behind the Name summarises the Fourth Branch of the Mabinogi: Dylan was a son of Arianrhod and twin brother of Lleu Llaw Gyffes; immediately after he was baptized he took to the sea, where he could swim as well as a fish, and he was slain accidentally by his uncle Gofannon. Wikipedia calls this figure Dylan ail Don, a sea deity or heroic figure connected to waves and tides, and notes a legend that he may have inspired Dyonas, the Arthurian father of Vivian, the Lady of the Lake. As a given name it remained a Welsh name until the 20th century. Behind the Name attributes its spread outside Wales in the second half of the century to two bearers: the Welsh poet Dylan Thomas (1914–1953) and the American musician Bob Dylan (born 1941), real name Robert Zimmerman, who took his stage surname from the poet's given name. It received a further boost in the 1990s from a character on the television series Beverly Hills 90210, whom Wikipedia identifies as Dylan McKay, played by Luke Perry. Wikipedia adds that Dylan was the most popular Welsh name given to boys in Wales in 2010.
| Period | What changed |
|---|---|
| Medieval Welsh literature | Dylan, son of Arianrhod and twin of Lleu Llaw Gyffes, takes to the sea after his baptism in the Fourth Branch of the Mabinogi and is later killed accidentally by his uncle Gofannon. |
| 1914–1953 | The Welsh poet Dylan Thomas gives the name its first international fame. |
| 1941 onward | Robert Zimmerman adopts the stage name Bob Dylan from the poet's given name. |
| Second half of the 20th century | Use of the name spreads outside Wales because of Dylan Thomas and Bob Dylan. |
| 1990s | The character Dylan McKay on Beverly Hills 90210 gives the name a further boost. |
| 2010 | Dylan is the most popular Welsh name given to boys in Wales. |
| 2025 | Ranked #41 for boys and #808 for girls in the United States. |
Popularity
Dylan ranked #41 for boys and #808 for girls in the United States in 2025 (Social Security Administration), which is why this profile treats it as unisex even though Behind the Name labels it masculine. Behind the Name attributes the name's spread outside Wales to Dylan Thomas and Bob Dylan in the second half of the 20th century, and a further rise in the 1990s to a Beverly Hills 90210 character. Wikipedia records that it was the most popular Welsh name given to boys in Wales in 2010.
| Region | Year | Rank | Source |
|---|---|---|---|
| United States (boys) | 2025 | #41 | ssa-2025 |
| United States (girls) | 2025 | #808 | ssa-2025 |
United States, 2025: #41 (Social Security Administration)
Pronunciation around the world
Behind the Name gives two pronunciations: Welsh /ˈdəl.an/, roughly DUL-an with a short first vowel, and English /ˈdɪl.ən/, DIL-ən. The Behind the Name entry lists no equivalents in other languages; the name is used in its Welsh spelling wherever it has travelled. The English spelling variants Dillon and Dillan are pronounced the same way as the English form.
| Language or region | Pronunciation | Local forms |
|---|---|---|
| Welsh | /ˈdəl.an/ — DUL-an | Dylan |
| English | /ˈdɪl.ən/ — DIL-ən | Dylan, Dillon, Dillan |
Common mispronunciations: English speakers say DIL-ən; the Welsh first vowel is closer to the vowel in 'dull', which is not wrong in English but marks the speaker as using the Welsh form.
Nicknames, variants, and related names
Nicknames: None documented.
Variants: Dillon, Dillan, Dylann, Dylon
Related names: Dillon
What the name feels like
Dylan reads as modern, artistic and slightly rebellious, an image borrowed almost entirely from its two famous bearers rather than from its mythological origin. It sits comfortably beside other Celtic-flavoured names that crossed into mainstream American use in the same period, such as Liam, Owen, Aidan and Rowan, and its occasional use for girls puts it in the company of Riley and Rowan rather than of traditional boys' names. Parents who choose it usually want a name that is familiar without being formal.
Style tags: Welsh, mythological, artistic, modern classic, unisex-leaning masculine, top 50
Editorial interpretation: This style summary and the recommendations below are editorial opinion. The sourced facts are the Welsh etymology, the Mabinogi story, the role of Dylan Thomas and Bob Dylan in the name's spread, and the 2025 ranks; the characterisation of the name's image and its company among other names is the writer's judgment.
People and stories associated with the name
The name's story runs from a Welsh sea-child of myth to a poet, a folk singer and a run of television characters. Only bearers named in the Behind the Name and Wikipedia entries consulted are listed.
| Name | Type | Context |
|---|---|---|
| Dylan ail Don | mythological | Son of Arianrhod and twin of Lleu Llaw Gyffes in the Fourth Branch of the Mabinogi; took to the sea after his baptism and was accidentally killed by his uncle Gofannon. |
| Dylan Thomas (1914–1953) | historical | Welsh poet; the bearer who carried the name outside Wales. |
| Bob Dylan (born 1941) | contemporary | American musician, born Robert Zimmerman, who took his stage surname from the poet's given name. |
| Dylan McDermott (born 1961) | contemporary | American actor. |
| Dylan Dreyer (born 1981) | contemporary | Television meteorologist. |
| Dylan O'Brien (born 1991) | contemporary | American actor and musician. |
| Dylan Penn (born 1991) | contemporary | Model and actress, daughter of Sean Penn; a female bearer. |
| Dylan McKay (Beverly Hills 90210) | fictional | Television character played by Luke Perry; credited with boosting the name in the 1990s. |
| Dylan Mayfair (Desperate Housewives) | fictional | Television character played by Lyndsy Fonseca; a female bearer. |
| Dylan "Dil" Pickles (Rugrats) | fictional | Animated character voiced by Tara Strong. |
If you like this name
Names that share Dylan's Welsh or Celtic origin, its easy modern sound, or its artistic association.
Similar by origin
Similar by sound
Similar by style
Frequently asked questions
What does the name Dylan mean?
Dylan is Welsh. Behind the Name derives it from the prefix dy, "to, toward", and llanw, "tide, flow". Wikipedia reads dy as "great" and offers "great tide" or "son of the sea". The sources agree on the sea/tide element and differ on the first part.
Is Dylan a boy's name or a girl's name?
Mostly a boy's name, with some use for girls. In the United States in 2025 it ranked #41 for boys and #808 for girls. Behind the Name labels it masculine; Wikipedia classifies it as unisex.
Is Dylan a popular name?
Yes. Dylan ranked #41 for boys in the United States in 2025, and Wikipedia records it as the most popular Welsh name given to boys in Wales in 2010.
Who was Dylan in Welsh mythology?
In the Fourth Branch of the Mabinogi, Dylan was a son of Arianrhod and the twin brother of Lleu Llaw Gyffes. Immediately after his baptism he took to the sea and swam as well as a fish; he was later killed accidentally by his uncle Gofannon.
Is Bob Dylan's real name Dylan?
No. Behind the Name notes that Bob Dylan was born Robert Zimmerman and took his stage surname from the given name of the Welsh poet Dylan Thomas.
How do you pronounce Dylan?
In English, DIL-ən (IPA /ˈdɪl.ən/). Behind the Name gives the Welsh pronunciation as /ˈdəl.an/, with a first vowel closer to that of 'dull'.
Sources
- Behind the Name: Meaning, origin and history of the name Dylan — supports etymology, Welsh and English pronunciation, Mabinogi story, sea-god theory, Dylan Thomas and Bob Dylan, Beverly Hills 90210 boost, variants Dillan and Dillon.
- Wikipedia: Dylan (name) — supports 'great' reading of dy, 'son of the sea' translations, Dylan ail Don and Dyonas, Wales 2010 popularity, unisex classification, spellings Dylann and Dylon, notable bearers and fictional characters.
- U.S. Social Security Administration: Popular Baby Names — national data, year of birth 2025 — supports popularity.
