Dillian
- US rank
- Unranked
- Syllables
- 2
- Peak
- #1,955 in 1992
0 babies were named Dillian in the US in 2025.
Found on lists
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US births per million boys, 1989–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Dillian you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryDillian first shows up in US birth records in 1989, the first year at least 5 babies got it. It has been in use for 36 years since.
- Best yearIts best year was 1992, when it reached #1,955.
About the name Dillian
Dillian is a boy name of Irish origin. It has 7 letters and 2 syllables, starting with D and ending in “-ian”. US birth records list Dillian for boys from 1989 to 2021, in 31 of those 33 years. Its best year was 1992, when it ranked #1,955 among boy names. It hasn't been given to 5 or more US babies in a year since 2021, so today it's a genuinely rare choice.
Origin:Irish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1980s | 3.0 | 333,333 boys |
| 1990s | 15 | 66,225 boys |
| 2000s | 11 | 91,996 boys |
| 2010s | 4.5 | 222,222 boys |
| 2020s | 3.2 | 312,500 boys |
Other spellings of Dillian
More Irish boy names
- Boy name: Liam · resolute protector
- Unisex name: Owen · well-born
- Unisex name: Logan · little hollow
- Unisex name: Nolan · descendant of Nuallán
- Unisex name: Gael · a Gael
- Boy name: Arthur · possibly bear
- Unisex name: Ryan · little king
- Boy name: Dominic · of the Lord
Questions about the name Dillian
What is the origin of the name Dillian?
Dillian has Irish roots in our records. Other Irish names include Liam, Owen, Logan.
Is Dillian a boy or girl name?
Dillian is a boy name.
How popular is the name Dillian?
Dillian is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2021. It peaked at #1,955 in 1992.