Rhiannon
Girl name · #1119 in 2025 · Rare
How old is the name Rhiannon? In official American birth records, Rhiannon has been tracked continuously since 1974, giving it 51 years of documented American history.
Rhiannon is currently the #1119 girl name in the United States — 210 babies received it in 2025. A decade ago it stood at #1743, so the name has been rising over the past ten years. Roughly one in every 8,571 girls born in 2025 was named Rhiannon.
Babies named Rhiannon per year. Source: Official national birth records.
The 51-year story
Rhiannon first appears in the Social Security records in 1974, when 5 girls received the name. Its peak came in 1999, when 651 girls were named Rhiannon — good for #424 that year. Today's parents encounter it on its way down the popularity curve, which for many parents is exactly the appeal. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Unlock the 5-year forecast and compare Rhiannon against up to 5 other names.
Uniqueness: will there be another Rhiannon in class?
On our rarity read — which blends how common Rhiannon is today with its five-year momentum — the name reads as "rare". A high score means genuine rarity — your Rhiannon will likely be the only one in the room, with the occasional spelling-out as the price.
Where Rhiannon is most common
Geography matters for names, and Rhiannon is no exception. Adjusted for how many girls are born in each state, Rhiannon is most common in CO (0.5 per 1,000), PA (0.2 per 1,000), IL (0.2 per 1,000), NY (0.2 per 1,000), TX (0.1 per 1,000) — against a national average of about 0.2 per 1,000 girls. These are per-capita rates, so they show where Rhiannon is a genuine regional favorite rather than just where the most babies are born.
Names like Rhiannon
Statistically, parents drawn to Rhiannon tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Allyson, Carson, Alyson, Rebekah, and Rebeca.
AllysonCarsonAlysonRebekahRebecaClarissaCameronYasmeen
Rank history (last 25 years)
| Year | Babies named Rhiannon | Rank |
|---|---|---|
| 2025 | 210 | #1119 |
| 2024 | 178 | #1296 |
| 2023 | 210 | #1154 |
| 2022 | 219 | #1120 |
| 2021 | 224 | #1103 |
| 2020 | 204 | #1156 |
| 2019 | 189 | #1239 |
| 2018 | 150 | #1461 |
| 2017 | 158 | #1436 |
| 2016 | 142 | #1567 |
| 2015 | 120 | #1743 |
| 2014 | 134 | #1602 |
| 2013 | 106 | #1888 |
| 2012 | 128 | #1663 |
| 2011 | 156 | #1446 |
| 2010 | 161 | #1420 |
| 2009 | 204 | #1218 |
| 2008 | 250 | #1045 |
| 2007 | 289 | #934 |
| 2006 | 378 | #739 |
| 2005 | 363 | #741 |
| 2004 | 439 | #622 |
| 2003 | 476 | #579 |
| 2002 | 511 | #537 |
| 2001 | 553 | #496 |
Frequently asked questions
How old is the name Rhiannon?
In official American birth records, the name Rhiannon first appeared in 1974 (over 51 years ago), when 5 newborn girls received the name. It has been tracked in modern national records for 51 years.
Is Rhiannon a popular girl name?
Rhiannon ranked #1119 among girls in 2025 with 210 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #1743.
When was the name Rhiannon most popular?
Rhiannon peaked in 1999, when 651 American girls received the name (ranked #424 that year). Since 1999 the name has declined from that high.
How rare is the name Rhiannon?
In 2025, roughly 1 in 8,571 newborn American girls was named Rhiannon. On our rarity scale (rarity blended with momentum) we classify it as "rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.