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Riordan

#7,099 in 2025Boys' name

Irish surname transferred into given-name use

Riordan has been given to 297 babies in the U.S. since 1986. In 2025 it ranked #7,099 of 13,926 boys’ names in use. Its peak year was 2013, with 18 recorded.

Babies named Riordan, 2025

1 in 276,000

Riordan over time, 1880–2025

Boys
0510152018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Riordan: meaning, origin, and history

Irish surname transferred into given-name use

Irish surname transfer

What Riordan means

Riordan is a given name.

Documented naming usage and pronunciation

Riordan is used in English (Rare).

The naming story behind Riordan

Riordan is a given name adopted from Irish surname. This establishes the immediate naming route. A surname transfer is different from a direct translation of the modern given-name spelling; the family name may have its own earlier derivation.

American usage and historical context

In the United States, 297 boys were recorded with the name Riordan between 1986 and 2025. Its highest annual count was 18 in 2013; its best national rank was #5,123 in 2013.

Over 5 years its rank rose, from #10,369 in 2020 to #7,099 in 2025. Over 10 years its rank rose, from #7,914 in 2015 to #7,099 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

How common is Riordan?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 276,000
12 of 3,315,165 births
Among boys only
1 in 142,000
<0.01% of boys
Rank, 2025
#7,099
of 13,926 boys’ names in use
Coin-flip room size
191,493 kids
Even odds of a second one

Where Riordan sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 191,493 children born in 2025 and it's an even bet that one of them is another Riordan. In a class of 30 the chance is Under 1%.

When Riordans were born

Half of everyone ever recorded as Riordan was born before 2009 — so the typical Riordan is around 16 today.

Median birth year
2009
About 16 years old
Biggest decade
2000s
32.7% of all use
Born in the last 25 years
78.1%
A modern name
Recorded since 1950
297
People you could plausibly meet
Choose a decade

2000s — 32.7% of all recorded uses (97).

Is Riordan rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
—
Not ranked then
Rank vs 5 years ago
+3,270
Places climbed
Rank vs 10 years ago
+815
Places climbed
Births vs 10 years ago
1.20×
More babies than then
Share of its own peak
66.7%
Peak was 2013 (18)
Years since peak
12
Years
Year-to-year steadiness
Shifting
23.5% average annual change
Best rank ever
#5,123
2013

Spellings of Riordan

Riordan is not the most common spelling — Jordan is, with 99.4% against Riordan's 0.07%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Riordan around the world

Where Riordan ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1996–2024
    #4,271
    in 2024
  • Canada
    2013–2013
    #2,635
    in 2013
  • South Australia
    1981–1999
    #539
    in 1999

Popularity data from Office for National Statistics, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Riordan by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#7,099
Trend vs 5 yrs ago
Up 3,270
Best rank ever
#5,123
2013
Peak year
2013
18 that year
First recorded
1986
Last recorded
2025
All-time count
297
Count in 2025
12

Names similar to Riordan

Matched on shared beginnings and endings, similar length, and comparable popularity.

RamadanRiottLeodanYordanCaidanHamdanZaidanBreydanBrydanNandanBraydanJeydanRaydanJhordanCadanZaydanKaydanBogdanDardanJourdanBohdanAldanGeordanHaydan

Sibling names for Riordan

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Riordan

Top names of 2013, Riordan's peak yearThe 2010s in fullOther names that peaked in 2013Boys' names starting with R