Total births
642
Girls' name · since 1930
Rosilyn
Since 1930, U.S. Social Security records show 642 babies named Rosilyn, peaking in 1949. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 642
- total births
- 1930–2023
- years on record
- 1950s
- peak decade
- 22%
- born in that decade
642 girls have been named Rosilyn since 1930, though it isn't currently a top-ranked name.
Social Security Administration records show Rosilyn recorded 642 times among girls since 1930, though it doesn't currently rank among the most-used girls names, peaking in the 1950s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1930 to 2023.
- 642 total births
- 1930–2023 years on record
- 1950s peak decade
- 22% born in that decade
Data updated Jul 2026
The verdict
642 girls have been named Rosilyn since 1930, peaking in the 1950s, last recorded in 2023.
- 642
- total births
- 1930–2023
- years on record
- 1950s
- peak decade
- 22%
- born in that decade
1950s
Peak decade
22% of everyone ever named Rosilyn was born in this single decade.
1949
Single peak year
22 babies were named Rosilyn in 1949 - its busiest year on record.
Rosilyn's usage pattern, beyond the headline number
Rosilyn splits its recorded history at 1967: 42% of all births land in the more recent half, 58% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1931 (5 births) -- compare that against the 1949 peak of 22 for a sense of just how much the name's popularity has swung.
Rosilyn at a glance
Last recorded 2023Peak year
1949
Current rank
Unranked
Active since
1930
Rosilyn popularity over time
Annual U.S. births registered with the Social Security Administration · 1930–2023
- Peak year (1949)
- 22
- Annual births at peak, across 94 years of records
Rosilyn by decade
Total births in each ten-year window, peak vs trough at a glance
1950s was Rosilyn's strongest decade.
141 babies received the name during that ten-year window, about 22% of all-time use.
Rosilyn births by decade
Total births in each ten-year window
- 1930s 45
1930s
45 births
- 1940s
1940s
98 births
- 1950s
1950s
141 births
- 1960s
1960s
126 births
- 1970s
1970s
77 births
- 1980s 23
1980s
23 births
- 1990s 8
1990s
8 births
- 2000s 23
2000s
23 births
- 2010s
2010s
67 births
- 2020s 34
2020s
34 births
What this shows Peak: 1950s at 141 births (22% of all-time use).
How Rosilyn compares to similarly-sized names
Years in SSA records vs. share of all-time use concentrated in the single peak year, among 15 girls names closest to Rosilyn's total volume
Rosilyn vs 15 similarly-sized girls names
Rosilyn by state
Where Rosilyn concentrates geographically, total births since 1930
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | North Carolina | | 6 | 0.9% |
| #2 | New York | | 6 | 0.9% |
North Carolina share of Rosilyn's total US births 0.9%
Even split
6 of 642 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Rosilyn? ▼
642 babies have been named Rosilyn since 1930. It was last recorded in 2023. The peak year was 1949 with 22 births.
When was Rosilyn most popular? ▼
Rosilyn was most popular in the 1950s decade with 141 total births. The single peak year was 1949.
Where is Rosilyn most popular? ▼
The top states for the name Rosilyn are North Carolina (6 births), New York (6 births).
How long has the name Rosilyn been used? ▼
Records for Rosilyn go back to 1930, giving 94 years of history through 2023.
What names are similar to Rosilyn? ▼
Names with a similar sound or spelling include Rose, Rosa, Rosemary, Rosie, and 4 more. These share a common prefix and are also used for girls.
What to do with Rosilyn's data
- Rosilyn's decade-level peak was the 1950s (141 total births); usage has since declined to 34 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- North Carolina records the most Rosilyns (6 births) -- see the full state breakdown if geography matters to your decision. North Carolina names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Rosilyn
Nearby Names Like Rosilyn
Names with a similar sound, spelling, or feel to Rosilyn
Rose Girl
#114 500,586 births
Rosa Girl
#662 177,415 births
Rosemary Girl
#301 163,165 births
Rosie Girl
#310 85,556 births
Rosalie Girl
#177 84,049 births
Compare Rosilyn side by side: Rosilyn vs Rose Rosilyn vs Rosa Rosilyn vs Rosemary
Related Names
Names with a similar number of total births
Data Sources
Data as of July 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1930–2023 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Rosilyn: Baby Name Since 1930 - 642 Births, Peak 1949." NameAlmanac. Accessed via https://namealmanac.com/name/rosilyn. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Rosilyn draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of July 2026.