Cassiopeia

#8,975 in 2025Girls' name

Possibly cassia juice

Cassiopeia has been given to 391 babies in the U.S. since 1979. In 2025 it ranked #8,975 of 17,293 girls’ names in use. Its peak year was 2022, with 18 recorded.

Babies named Cassiopeia, 2025

1 in 301,000

Cassiopeia over time, 1880–2025

Girls

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cassiopeia: meaning, origin, and history

Possibly cassia juice

Ancient Greek and Latin

What Cassiopeia means

Cassiopeia may mean “cassia juice”.

Dictionary etymologyReferences, data & attribution

From Latin Cassiopēia, from Ancient Greek Κασσιόπεια (Kassiópeia) or Κασσιόπη (Kassiópē).

Excerpt from Wiktionary: Cassiopeia (English) · CC BY-SA 4.0

Wiktionary material is available under CC BY-SA 4.0.

Origin, language, and formation

Cassiopeia is used in English. Its origins include Ancient Greek and Latin.

Cassiopeia comes through Latin Cassiopēia and Ancient Greek Κασσιόπεια.

Pronunciation and spelling

In English, Cassiopeia is pronounced /ˌkæs.i.əˈpiː.ə/.

American usage and historical context

In the United States, 391 girls were recorded with the name Cassiopeia between 1979 and 2025. Its highest annual count was 18 in 2022; its best national rank was #4,768 in 1984.

Over 5 years its rank rose, from #9,695 in 2020 to #8,975 in 2025. Over 10 years its rank rose, from #11,074 in 2015 to #8,975 in 2025.

How common is Cassiopeia?

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

Among all babies, 2025: 1 in 301,000; 11 of 3,315,165 births
Among girls only: 1 in 146,000; <0.01% of girls
Rank, 2025: #8,975; of 17,293 girls’ names in use
Coin-flip room size: 208,901 kids; Even odds of a second one

Where Cassiopeia sits on the popularity scale

Rarest published (5 a year)#1 — Olivia (13,544)

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 208,901 children born in 2025 and it's an even bet that one of them is another Cassiopeia. In a class of 30 the chance is Under 1%.

When Cassiopeias were born

Half of everyone ever recorded as Cassiopeia was born before 2002 — so the typical Cassiopeia is around 23 today.

Median birth year: 2002; About 23 years old
Biggest decade: 1980s; 27.9% of all use
Born in the last 25 years: 53.5%; A modern name
Recorded since 1950: 391; People you could plausibly meet

Choose a decade

1980s — 27.9% of all recorded uses (109).

Is Cassiopeia 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: −425; Places dropped
Rank vs 5 years ago: +720; Places climbed
Rank vs 10 years ago: +2,099; Places climbed
Births vs 10 years ago: 1.22×; More babies than then
Share of its own peak: 61.1%; Peak was 2022 (18)
Years since peak: 3; Years
Year-to-year steadiness: Volatile; 30.5% average annual change
Best rank ever: #4,768; 1984

Cassiopeia around the world

Where Cassiopeia 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
2005–2025
#5,927
in 2025
Canada
2017–2023
#2,973
in 2023
South Australia
1999–1999
#729
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.

Cassiopeia by the numbers

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

As a girl's name

Rank in 2025: #8,975
Trend vs 5 yrs ago: Up 720
Best rank ever: #4,768; 1984
Peak year: 2022; 18 that year
First recorded: 1979
Last recorded: 2025
All-time count: 391
Count in 2025: 11

Names similar to Cassiopeia

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

Cashmere Cassidee Cashlynn Cassandre Casaundra Cassidie Cassandria Casimira Cassaundra Cassadee Annaleia Caselynn Cassady Kataleia Cassundra Castella Cataleia Cassadie Aletheia Cassity Cassandr Casondra Andreia Cassandrea

Sibling names for Cassiopeia

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

For a sister

Annabell Abagail Karleigh Rhianna Adelle Keren Kendyl Anabel

For a brother

Aaden Kale Hamilton Evans Brennen Tobin Jerimiah Jorden

Explore around Cassiopeia

Top names of 2022, Cassiopeia's peak year The 2020s in full Other names that peaked in 1984 Girls' names starting with C Star & Constellation Names