Rhiannon
Rhiannon was given to 210 girls in 2025, #1,119 among girls’ names; 15,544 Americans have been recorded with it since 1974 (Social Security Administration, published May 2026).
An estimated 15,200 Americans named Rhiannon and born in the U.S. are alive in 2026 (98% of everyone recorded); the median is 28 years old and half are between 21 and 40.
Girls and boys together; gaps are years SSA did not record (fewer than 5 births).
Births of Rhiannon by year: SSA national baby-name file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
What does Rhiannon mean?
Wiktionary, English section
Rhiannon is “a female given name from Welsh.”
Meaning: Wiktionary, English section, as of Sep 25, 2026 (CC BY‑SA 4.0).
How popular is Rhiannon?
#1,119 among girls’ names, 2025
Rhiannon rose from #1,755 in 2015 to #1,119 in 2025 among girls’ names; its share of girls born rose from 0.07 to 0.13 per 1,000.
651 babies in 1999, the peak
Rhiannon peaked in 1999, when 651 girls were given it, #424 among girls’ names. The 210 births of 2025 are 32% of that peak.
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2025 | 210 | #1,119 | 0.13 |
| 2024 | 178 | #1,300 | 0.11 |
| 2023 | 210 | #1,157 | 0.13 |
| 2022 | 219 | #1,128 | 0.13 |
| 2021 | 224 | #1,108 | 0.14 |
| 2020 | 204 | #1,157 | 0.13 |
| 2019 | 189 | #1,241 | 0.11 |
| 2018 | 150 | #1,471 | 0.09 |
| 2017 | 158 | #1,440 | 0.09 |
| 2016 | 142 | #1,571 | 0.08 |
Every recorded year (52)
| Year | Births | Rank | Per 1,000 girls |
|---|---|---|---|
| 2015 | 120 | #1,755 | 0.07 |
| 2014 | 134 | #1,613 | 0.08 |
| 2013 | 106 | #1,898 | 0.06 |
| 2012 | 128 | #1,670 | 0.07 |
| 2011 | 156 | #1,452 | 0.09 |
| 2010 | 161 | #1,427 | 0.09 |
| 2009 | 204 | #1,226 | 0.11 |
| 2008 | 250 | #1,048 | 0.13 |
| 2007 | 289 | #935 | 0.15 |
| 2006 | 378 | #740 | 0.20 |
| 2005 | 363 | #744 | 0.20 |
| 2004 | 439 | #622 | 0.24 |
| 2003 | 476 | #580 | 0.26 |
| 2002 | 511 | #537 | 0.28 |
| 2001 | 553 | #497 | 0.31 |
| 2000 | 612 | #453 | 0.34 |
| 1999 | 651 | #424 | 0.37 |
| 1998 | 554 | #467 | 0.31 |
| 1997 | 346 | #644 | 0.20 |
| 1996 | 297 | #712 | 0.17 |
| 1995 | 350 | #627 | 0.20 |
| 1994 | 389 | #586 | 0.22 |
| 1993 | 302 | #708 | 0.17 |
| 1992 | 325 | #676 | 0.18 |
| 1991 | 299 | #708 | 0.16 |
| 1990 | 320 | #671 | 0.17 |
| 1989 | 302 | #676 | 0.16 |
| 1988 | 240 | #786 | 0.13 |
| 1987 | 262 | #699 | 0.15 |
| 1986 | 296 | #629 | 0.17 |
| 1985 | 272 | #667 | 0.16 |
| 1984 | 360 | #534 | 0.21 |
| 1983 | 361 | #526 | 0.22 |
| 1982 | 391 | #514 | 0.23 |
| 1981 | 384 | #513 | 0.23 |
| 1980 | 408 | #500 | 0.25 |
| 1979 | 423 | #483 | 0.26 |
| 1978 | 460 | #435 | 0.30 |
| 1977 | 491 | #418 | 0.32 |
| 1976 | 272 | #593 | 0.19 |
| 1975 | 15 | #4,303 | 0.01 |
| 1974 | 5 | #9,833 | under 0.01 |
Ranks and shares: girls’ names in each year’s SSA file; share of all girls SSA recorded that year.
Is Rhiannon a boy’s or a girl’s name?
Rhiannon has been given almost only to girls: 5 boys in 52 years of records.
Girls and boys named Rhiannon: the SSA national file counts each sex separately.
How many people are named Rhiannon, and how old are they?
15,200 alive in 2026, estimated
That is 98% of the 15,544 Americans ever recorded as Rhiannon. The median Rhiannon alive today is 28 years old; half are between 21 and 40.
The 2020 Census counted 12,801 people named Rhiannon (12,781 women and girls, 20 men and boys). SSA’s births carried forward to Census day, April 1, 2020, predict 14,108 born in the U.S. The Census count is 9% below that prediction.
Alive today, by age
Alive today, by generation
| Generation | Born | Alive |
|---|---|---|
| Generation X | 1965-1980 | 1,970 |
| Millennials | 1981-1996 | 5,010 |
| Generation Z | 1997-2012 | 6,000 |
| Generation Alpha | 2013-2025 | 2,230 |
An estimate, not a count. SSA’s files count people born in the United States who received a Social Security number, so anyone born abroad is not in them; before 1937 most people got a number as adults, and their survival is counted from that age.
Living estimate: SSA births carried forward with the survival rates in SSA’s cohort life tables (2024 Trustees Report) for each birth year and sex. How the estimate is made. Count: Census Bureau, first names in the 2020 Census (released April 14, 2026; names reported 100 or more times, with the Bureau’s disclosure-avoidance adjustment).
Where are babies named Rhiannon born?
The states with the most babies named Rhiannon are Texas, California and New York, with 30% of its births recorded by state in 2025.
| State | Births 2025 | Rank, girls | vs. national |
|---|---|---|---|
| Texas | 17 | #1,447 | 0.7× |
| California | 16 | #1,466 | 0.9× |
| New York | 13 | #1,138 | 0.7× |
| Pennsylvania | 11 | #858 | 1.1× |
| Colorado | 11 | #530 | 1.7× |
| Illinois | 10 | #911 | 0.8× |
| Arizona | 9 | #741 | 1.5× |
| New Jersey | 9 | #834 | 0.6× |
| Virginia | 8 | #917 | 0.9× |
| Washington | 7 | #887 | 1.3× |
Where Rhiannon is more common than its national share predicts
Relative to its national share, Rhiannon is most over-represented in New Mexico: since 1974 it was given 2.4 times as often there as its national share each year would predict.
States: SSA state file, 1910-2025, published May 8, 2026; births count girls and boys together, and the rank is among girls’ names in the state in 2025. The file leaves out any state and year with fewer than 5 babies of the name, so small states are undercounted; each ratio compares the state’s births of Rhiannon with the births its national share predicts year by year, for states with at least 100 births of the name.
Names spelled alike
Of these 5 names spelled alike, given to 16,458 babies since 1880, Rhiannon is the most given (94% of them). In 2025 it was given to 210 of their 210 babies (100%), again the most given.
Spelled alike: names in the SSA national file with the same pattern of letters and sounds and at most two letters apart, and Wiktionary’s listed forms; births since 1880 and in 2025, and each name’s peak year, from the SSA national file, published May 8, 2026. Some are separate names, not spellings of one.
Names that rose and fell in the same decades as Rhiannon
Names whose births rose and fell across the same decades, measured on each decade’s share of births.
Similar histories: each decade’s share of births, from the SSA national file, 1880-2025, published May 8, 2026. SSA’s notes on the data.
More about Rhiannon and names like it
- Compare Rhiannon and RhianonBirths, ranks, peak and the living estimate side by side.
- The most given names of the 1990sRhiannon peaked in 1999.
- California’s most given namesThe state where SSA recorded the most babies named Rhiannon since 1910.
- Welsh namesWiktionary’s origin for Rhiannon: every such name, by how often it is given.
- The top names of 1999The year the most babies were named Rhiannon.
- The names of Generation ZMost people named Rhiannon alive today were born 1997-2012.
- Names starting with RMost given first.