Baby Names US
boys' name ★ peaked 1918

Casimer

Gender Boy Rank 2025 Below top lists
Rank 2025
–
among boys
Babies in 2025
<5
named Casimer
How common
–
boys born in 2025
Peak year
1918
135 babies
All-time total
1,895
#3,422 all-time among boys
First recorded
1895
in Social Security records

Casimer popularity over time

1,895 babies have been named Casimer since 1895, according to official Social Security records. Switch measure to see births per year or the yearly rank.

Measure
Births per 1,000 babies of that sex, comparable across eras
0.040.080.110.1518801900192019401960198020002020Peak 1917Boys

By decade. Change compares yearly averages, so the current partial decade is on equal footing. Best rank is the name's best yearly rank within the decade.

Decade Boys Per year Change Best rank
1880s – – – –
1890s 13 1 – #890
1900s 61 6 +369% #765
1910s 767 77 +1157% #510
1920s 639 64 -17% #593
1930s 158 16 -75% #1,360
1940s 123 12 -22% #1,646
1950s 87 9 -29% #1,753
1960s 18 2 -79% #3,283
1970s 7 1 -61% #4,025
1980s 6 1 -14% #5,619
1990s 6 1 0% #8,862
2000s 5 1 -17% #12,784
2010s 5 1 0% #12,608
2020s (to 2025) – – – –

The story of Casimer

Casimer is not currently in use for newborns in the United States: fewer than five babies received the name in 2025. Its story lives in the historical record below.

Since 1895, 1,895 American babies have been named Casimer. Its peak came in 1918, when 135 newborns received the name, the signature sound of the 1910s.

The chart above shows the full history: the popularity view (births per 1,000 babies) is the honest comparison across generations, since total US births have changed enormously since 1880. Switch to the rank view to see where Casimer stood among all boys' names in any year, or use the compare tool to plot it against other names.

How old are people named Casimer?

The median living Casimer is about 75 years old; half are between 68 and 82. An estimated 200 people named Casimer are alive in the United States today.

median 75 020406080100

Estimated from births per year and Social Security period life tables; an approximation of the living age distribution, by age in years.

Casimer year by year

Every year since 2001, and five-year steps back to 1880. Rank is within each sex.

Year Boys Boys rank
2025 – –
2024 – –
2023 – –
2022 – –
2021 – –
2020 – –
2019 – –
2018 – –
2017 5 #12,608
2016 – –
2015 – –
2014 – –
2013 – –
2012 – –
2011 – –
2010 – –
2009 5 #12,784
2008 – –
2007 – –
2006 – –
2005 – –
2004 – –
2003 – –
2002 – –
2001 – –
2000 – –
1995 – –
1990 – –
1985 – –
1980 6 #5,619
1975 – –
1970 – –
1965 7 #3,283
1960 – –
1955 8 #3,000
1950 18 #1,753
1945 14 #1,862
1940 – –
1935 9 #2,558
1930 25 #1,467
1925 57 #891
1920 111 #593
1915 102 #558
1910 19 #682
1905 8 #939
1900 9 #914
1895 7 #890
1890 – –
1885 – –
1880 – –

Frequently asked questions

Quick answers about Casimer, drawn from the same Social Security data as the charts above.

How old is the average Casimer?

The median living Casimer is about 75 years old. Half of all living Casimers are between 68 and 82 years old.

How many people named Casimer are alive today?

An estimated 200 people named Casimer are alive in the United States, based on 1,895 recorded births and Social Security life tables.

How popular is the name Casimer in 2025?

Casimer did not appear in the 2025 Social Security data, which means fewer than five babies received the name that year.

How many people are named Casimer?

1,895 babies have been named Casimer in the United States since 1895, based on Social Security card applications.

When was the name Casimer most popular?

Casimer peaked in 1918, when 135 newborns received the name.

Is Casimer a boy or girl name?

Casimer is overwhelmingly a boy's name: 100% of babies with the name.

Is the name Casimer rising or falling?

Casimer has been roughly stable over the past decade.

Names like Casimer

Names that sound and feel close to Casimer: shared sounds, similar era, similar popularity. Each links to its full history.

Compare Casimer with similar names → More names starting with C →