Given name & surname
Kasimir
“one who demands peace”
Kasimir is used as a given name and a surname. One Slavic interpretation is “one who demands peace.”
Meaning & origin
What it means
One Slavic interpretation is “one who demands peace.”
Where it comes from
An origin associated with this spelling is Slavic.
The story
Published U.S. birth records include this spelling as early as 1917. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Kasimir through the years
- Babies since 1880
- 80
- 80 boys · 0 girls
- Most popular year
- 2021
- 9 babies
- 2025
- 6
- #11,344 for boys
- 2021–25 vs 2016–20
- +100%
- Rising fast
By the numbers
In 2025, this name appeared in 6 U.S. birth records for boys, ranking No. 11,344 among boys’ names. The recent annual counts are too incomplete to establish a ten-year comparison. Published U.S. population figures for this spelling include 118 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Kasimir’s family of names
In Alemannic German usage, Kasimir has a diminutive in Kasi. In German usage, Kasimir has a conventional equivalent in the Spanish form Casimiro. In German usage, Kasimir has a conventional equivalent in the Polish form Kazimierz.
Inner ring: nicknames and forms · outer: across languages.
Around the world
Kasimir has relatives in 9 languages. Lines run from its Proto-Slavic roots to each of them.
7 related names in 9 languages. Point at a dot, or tab to the map and use the arrow keys.
Nicknames & forms 15
Diminutives, pet forms, short forms and variants used alongside the name.
Across languages 6
Equivalents and cognates in other languages, plus older forms it grew from.
People named Kasimir
- Kazimir HnatowFrench footballer (1929–2010)
- Casimir, Margrave of Brandenburg-KulmbachMargrave of Bayreuth (1481-1527)1482–1527
- Kazimír GajdošSlovak footballer (1934-2016)
- Casimir I of OpoleDuke of Opole-Racibórz1178–1230
- Kasimir EdschmidGerman writer (1890–1966)
- Frederick Casimir, Count Palatine of Zweibrücken-LandsbergCount Palatine of Zweibrücken-Landsberg1585–1645
- Casimir William of Hesse-HomburgPrince of Hesse-Homburg (1690-1726)
- Casimir of BytomDuke of Opole and Bytom1250–1312
- Casimir IV of PomeraniaDuke of Pomerania-Stolp1351–1377
Listed by how widely each person is written about, which says nothing about the name itself.
Similar names
If you love Kasimir, these share its style, era, origin or sound, from outside its own family.
Vladimir
“be strong”
>99% boys
Isser
“one who is creative”
>99% boys
Ilija
Ilija is a masculine given name from Old Church Slavonic, ultimately from Biblical Hebrew. It is used in Serbo-Croatian.
>99% boys
Damir
“one who promotes peace”
>99% boys
Zoran
“born with the morning's first light”
>99% boys
Mach
“work”
>99% boys
Zorro
“hero of the golden dawn”
>99% boys
Ziven
“one who is vigorous; full of life”
>99% boys