Dyllan
Meaningson of the sea · Welsh form of Dylan
- US rank
- #11,932
- Syllables
- 2
- Peak
- #4,023 in 2010
7 babies were named Dyllan in the US in 2025. It has climbed 210 places in five years.
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US births per million girls, 1991–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Dyllan you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 227,273 baby girls born in the US in 2025 was named Dyllan, 7 babies in all. In a typical school of 500 kids, your Dyllan would very likely be the only one.
- HistoryDyllan first shows up in US birth records in 1986, the first year at least 5 babies got it. It has been in use for 39 years since.
- Best yearIts best year was 2010, when it reached #4,023.
- TrendDyllan has climbed 210 places in the US rankings over the last five years and now sits at #11,932. Fast risers like this often keep climbing, so expect to hear it more.
- Boy or girlDyllan is given to both boys and girls: 61% of the 18 babies named Dyllan in 2025 were boys. That makes it one of the names that truly works for either.
- MeaningDyllan is a Welsh form of Dylan, which means “son of the sea”.
About the name Dyllan
Dyllan is a girl name of Welsh origin meaning “son of the sea”. It has 6 letters and 2 syllables, starting with D and ending in “-lan”. US birth records list Dyllan for girls from 1991 to 2025, in 34 of those 35 years. Its best year was 2010, when it ranked #4,023 among girl names. In 2025 it ranked #11,932, with 7 babies.
Origin:Welsh names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1990s | 4.4 | 226,700 girls |
| 2000s | 10.0 | 100,200 girls |
| 2010s | 11 | 88,261 girls |
| 2020s | 4.6 | 216,606 girls |
Other spellings of Dyllan
More Welsh girl names
- Girl name: Cecilia · blind
- Unisex name: Reese · ardor, enthusiasm
- Girl name: Arianna · most holy
- Unisex name: Rowan · little red-haired one
- Unisex name: Morgan · possibly sea circle
- Girl name: Sabrina · River Severn
- Unisex name: Teagan · possibly poet
- Girl name: Gwendolyn · white ring
Questions about the name Dyllan
What does the name Dyllan mean?
Dyllan means “son of the sea” in Welsh, as a form of Dylan.
What is the origin of the name Dyllan?
Dyllan has Welsh roots in our records. Other Welsh names include Cecilia, Reese, Arianna.
Is Dyllan a boy or girl name?
Dyllan is a girl name, though a few boys get it too.
How popular is the name Dyllan?
Dyllan ranked #11,932 for US girls in 2025, given to 7 babies. Its best year was 2010 (#4,023).