How Many People Are Named Rhiannan?
An estimated 165 people in the United States have the first name Rhiannan. It is almost exclusively a female name. The average bearer is 31 years old, and Rhiannan peaked in popularity in 1998 with 14 births that year.
Below you will find a full statistical profile of Rhiannan as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Rhiannan paired with any surname.
Estimated Living Americans
165
About 1 in 2,077,299 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
31
years old
Peak Year
1998
14 births
Total Registered
171
since 1880
Gender Distribution for Rhiannan
Rhiannan is almost exclusively a female name. Out of 171 total births registered, 100.0% were female.
Rhiannan as a female name
Ranked #14,895 in 2009
7 female births in 2009
Peak: 1998 (14 births)
Rhiannan: Popularity Over Time
SSA records for Rhiannan span from the 1970s to the 2000s, covering 4 decades of naming data. The most popular decade for this name was the 1990s, when 70 babies were registered. Rhiannan remains highly popular today, with recent registration numbers near its historical peak.
Rhiannan by Decade
How has Rhiannan tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Rhiannan + Last Name Combinations
How many people share a full name with Rhiannan as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Rhiannan
Other first names starting with R with a similar number of bearers.
Rhiannan: Questions and Answers
How many people in the U.S. are named Rhiannan?
We estimate approximately 165 people named Rhiannan are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 2,077,299 Americans share this first name.
Is Rhiannan a common name?
Rhiannan is classified as "Very Rare" and is more popular than 71.6% of all first names in the SSA database. A total of 171 births have been registered with this name since 1880.
When was Rhiannan most popular?
Rhiannan reached peak popularity in 1998, when 14 babies were given this name. The average age of a living person named Rhiannan is approximately 31 years old, reflecting when the name was most commonly given.
Is Rhiannan a female name?
Rhiannan is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Rhiannan Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Rhiannan Smith, Rhiannan Johnson, Rhiannan Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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