Dilys
- US rank
- Unranked
- Syllables
- 2
- Peak
- #4,274 in 1915
0 babies were named Dilys in the US in 2025.
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US births per million girls, 1915–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Dilys you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryDilys first shows up in US birth records in 1915, the first year at least 5 babies got it. It has been in use for 110 years since.
- Best yearIts best year was 1915, when it reached #4,274.
About the name Dilys
Dilys is a girl name of Celtic and Welsh origin. It has 5 letters and 2 syllables, starting with D and ending in “-lys”. US birth records list Dilys for girls from 1915 to 1946, in 4 of those 32 years. Its best year was 1915, when it ranked #4,274 among girl names. It hasn't been given to 5 or more US babies in a year since 1946, so today it's a genuinely rare choice.
Origin:Celtic namesWelsh names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1910s | 1.0 | 980,392 girls |
| 1920s | 0.4 | 2,380,952 girls |
| 1940s | 1.0 | 1,029,412 girls |
More Celtic girl names
- Girl name: Evelyn · possibly desired
- Girl name: Isla · from Islay
- Unisex name: Riley · rye clearing
- Girl name: Maeve · she who intoxicates
- Unisex name: Kennedy · helmeted head
- Unisex name: Quinn · descendant of Conn
- Unisex name: Blair · plain, field
- Girl name: Olive · olive tree
Questions about the name Dilys
What is the origin of the name Dilys?
Dilys has Celtic, Welsh roots in our records. Other Celtic names include Evelyn, Isla, Riley.
Is Dilys a boy or girl name?
Dilys is a girl name.
How popular is the name Dilys?
Dilys is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 1946. It peaked at #4,274 in 1915.