Jillyn
- US rank
- Unranked
- Syllables
- 2
- Peak
- #5,301 in 1950
0 babies were named Jillyn in the US in 2025.
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US births per million girls, 1950–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Jillyn you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- HistoryJillyn first shows up in US birth records in 1950, the first year at least 5 babies got it. It has been in use for 75 years since.
- Best yearIts best year was 1950, when it reached #5,301.
About the name Jillyn
Jillyn is a girl name of Irish origin. It has 6 letters and 2 syllables, starting with J and ending in “-lyn”. US birth records list Jillyn for girls from 1950 to 2002, in 27 of those 53 years. Its best year was 1950, when it ranked #5,301 among girl names. It hasn't been given to 5 or more US babies in a year since 2002, so today it's a genuinely rare choice.
Origin:Irish names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 1950s | 0.6 | 1,754,386 girls |
| 1960s | 2.3 | 431,034 girls |
| 1970s | 3.7 | 271,739 girls |
| 1980s | 2.7 | 364,964 girls |
| 1990s | 0.6 | 1,612,903 girls |
| 2000s | 0.9 | 1,071,429 girls |
Other spellings of Jillyn
More Irish girl names
- Girl name: Abigail · my father is joy
- Unisex name: Riley · rye clearing
- Girl name: Maeve · she who intoxicates
- Unisex name: Kennedy · helmeted head
- Unisex name: Rylee · rye clearing
- Unisex name: Sloane · raider
- Unisex name: Alani · orange tree
- Girl name: Everleigh · boar clearing
Questions about the name Jillyn
What is the origin of the name Jillyn?
Jillyn has Irish roots in our records. Other Irish names include Abigail, Riley, Maeve.
Is Jillyn a boy or girl name?
Jillyn is a girl name.
How popular is the name Jillyn?
Jillyn is rare: fewer than 5 US girls got it in 2025, and it was last given to 5 or more in 2002. It peaked at #5,301 in 1950.