Dilyn
UnisexBoys' nameGirls' nameMeaning not yet documented
Dilyn has been given to 540 babies in the U.S. since 1992. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 2001, with 25 recorded. It's used for both sexes: 57% boys, 43% girls all-time.
Babies named Dilyn, 2018
1 in 586,000
Dilyn over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
Girls or boys — Dilyn over time
In 2024, Dilyn went to 100% girls and 0% boys.
A sex is only published in years it reached five applications, so a stretch at 0% or 100% means the other side stayed under that floor — not that it was never used.
How common is Dilyn?
Dilyn had fewer than 5 recorded uses in 2025, so these figures use 2018, the last year it was published.
- Among all babies, 2018
- 1 in 586,000
- 6 of 3,516,853 births
- Among boys only
- 1 in 303,000
- <0.01% of boys
- Rank, 2018
- Unranked
- Fewer than 5 uses
- Coin-flip room size
- 406,284 kids
- Even odds of a second one
Where Dilyn sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2018 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 406,284 children born in 2018 and it's an even bet that one of them is another Dilyn. In a class of 30 the chance is Under 1%.
When Dilyns were born
Half of everyone ever recorded as Dilyn was born before 2003 — so the typical Dilyn is around 22 today.
- Biggest decade
- 2000s
- 54.2% of all use
- Born in the last 25 years
- 96.1%
- A modern name
- Recorded since 1950
- 310
- People you could plausibly meet
2000s — 54.2% of all recorded uses (168).
Is Dilyn rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- —
- Not ranked then
- Rank vs 5 years ago
- New entry
- Not ranked then
- Rank vs 10 years ago
- —
- Not ranked then
- Births vs 10 years ago
- —
- Not published both years
- Share of its own peak
- 0%
- Peak was 2001 (25)
- Years since peak
- 24
- Years
- Year-to-year steadiness
- Volatile
- 44.3% average annual change
Spellings of Dilyn
Dilyn is not the most common spelling — Dylan is, with 71.2% against Dilyn's 0.05%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Dilyn by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Dilyn
Matched on shared beginnings and endings, similar length, and comparable popularity.
Sibling names for Dilyn
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.