How rare is the name Rhiannon?

12,801 people in the United States have the first name Rhiannon, about 1 in 23,594. It ranks #2,100 of 53,615 first names in the 2020 Census.

first name

RHIANNON

#2,100

of 53,615 first names recorded in the 2020 Census

People
12,801
About
1 in 23,594
This common or more
78.5%
Who bears it

Of the 12,801 people named Rhiannon, 79% reported their origin as White, 10.3% as Hispanic or Latino and 6.5% as two or more races. Virtually all are female (99.8%). These count how people described themselves on the 2020 Census, not where the name comes from.

Rhiannon peaked in 1999, when 651 babies got the name.

Births per year, SSA records 1880–2025
19742025
Peak year
1999
Births that year
651
In 2025*
210 ▼68%
Recorded as
almost entirely female

At least 15,544 babies have been given the name since 1974. Years SSA withheld, because fewer than 5 were born, are skipped rather than drawn as zero. * 2025 is the newest year published and it undercounts: a card application is filed some time after a birth.

Rhiannon by decade

Among all names given to American babies, its best decade was the 1980s, when it ranked #1,076. The largest share of babies named Rhiannon, 39.1%, were born between 1997 and 2012, as Generation Z.

1970s#1,4571,666
1980s#1,0763,281
1990s#1,1273,833
2000s#1,2464,075
2010s#2,7581,444
2020s#2,1861,245
Generation X 1965–8013.3%
Millennials 1981–9633.2%
Generation Z 1997–1239.1%
2013 and later14.4%

Rank counts both sexes together, among every name SSA recorded that decade; the number under it is births. The 2020s run only to 2025. Generation years follow Pew Research Center, which has not named a generation after 2012.

Where Rhiannon is most common

Compared with all babies born in each state since 1910, Rhiannon has been most common in New Mexico (3.7×), Arizona (2.9×), and Colorado (2.7×), and least common in South Carolina (0.2×).

12,855 births recorded by state, 1910–2025. 2× means twice as common as nationally. States with fewer than 30 such births are left blank, and SSA withholds any year with fewer than 5 in a state, so small states read low.

Either side of Rhiannon

#2,098 Gisela · 12,810#2,099 Deidre · 12,807#2,101 Mercy · 12,795#2,102 Fredy · 12,789

Spelled almost the same

3 first names in the 2020 Census spelled within a letter or two of Rhiannon, most common first.

#25,436 Rheannon · 373#27,859 Rhianon · 326#39,517 Rhiannan · 191

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