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Casimir Name Meaning, Origins & History

Casimir

Pronunciation: KAZ-uh-meer

Meaning Bringing peace Origin Polish Gender Boy
BOYS RANK
#2,039
TREND
354
Peak Years
1919, 1920, 1917
Lowest Years
1894, 1975, 1897
Energy Archetype
Cheerful & Expressive

Rank shows the name’s position among U.S. baby names for each gender in 2025. Trend shows how many places it rose or fell since 2024. Rank 1 is the most popular. Based on U.S. Social Security Administration (SSA) data. Peak and lowest years are based on the number of boys named Casimir in the available records.

Fun Facts About the Name Casimir

  • More than 5 thousand babies named Casimir: U.S. records list 5,247 babies given the name Casimir from 1880 through 2025.

What Does the Name Casimir Mean?

Casimir is the English and French form of the Polish name Kazimierz, an old Slavic compound name made of two elements. The second element, mir, means "peace" and is agreed on. The first element is usually written kaz-, and that is where the uncertainty lies. The most commonly cited meaning, "destroyer of peace," takes it from the Slavic verb kazić, "to destroy, spoil, ruin." A second explanation takes it from the similar verb kazać, "to proclaim, command, order," which gives "proclaimer of peace" or "he who commands peace." The two verbs look and sound much alike, and no agreement has settled which one lies behind the name. Like other old Slavic two-part names, the compound was probably not understood as an ordinary sentence but simply as a name formula. The Latinized form Casimirus stands behind the Western European spellings, and the French and English Casimir comes from that Latin shape rather than directly from Polish.

Casimir Name History & Origins

The name appears in medieval Poland as Kazimierz. An early bearer was Kazimierz I, called the Restorer, who ruled as duke of Poland in the mid-11th century. The name was later carried by Kazimierz III the Great, king of Poland from 1333 to 1370, and by Kazimierz IV Jagiellon, grand duke of Lithuania and king of Poland from 1447 to 1492. Latin documents rendered the name as Casimirus, and from that form came German Kasimir, Czech Kazimír, Hungarian Kázmér, Lithuanian Kazimieras, and French and English Casimir.

The name's firm place in Christian Europe is tied to Saint Casimir (Kazimierz), a son of Kazimierz IV who died young in 1484 and was canonized in the early 16th century. He became a patron saint of Poland and of Lithuania, and his feast day on March 4 helped keep the name in use in both countries. The chapel in Vilnius Cathedral that holds his remains also bears his name.

In the English-speaking world the name has stayed relatively uncommon and is found mainly in families of Polish or Lithuanian background, usually in the form Casimir rather than Kazimierz. A later notable bearer outside Poland was the Dutch physicist Hendrik Casimir (1909 - 2000), whose surname uses the Dutch form of the name.

How Popular is the Name Casimir?

Casimir recorded its highest annual U.S. birth count in 1919. Its best rank was #393 in 1917.

U.S. name popularity from 1880-2025, based on SSA data. Rank shows how the name compares with other names - lower numbers mean greater popularity. Births shows how many babies received the name each year.

Name popularity over more than a century, based on Social Security Administration data. Gaps in the chart indicate years when the name does not appear in the published records.

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How the Name Casimir Shapes Your Personality and Life?

You are cheerful and friendly, but are apt to have an emotional life. You like to have several lines of effort going at once. You are a good talker and promoter and seldom worry over anything. At times, you can be impatient, and impulsive. You have the ability to bring an idea to completion. You can express yourself joyously and constructively. You might be psychic, but not know it. You are bold, independent, inquisitive and interested in research. You know what you want and why you want it.

You desire to inspire and lead, to control other's affairs. You are giving, courageous and bold, action oriented,energetic and strong willed. You want to make a difference in the world, and this attitude often attracts you to cultural interests, politics, social issues, and the cultivation of your creative talents.

✦ Casimir's Deeper Meaning & Tips for Parents Discover Casimir's symbolic numbers and practical tips for choosing a name that complements your child's birth date.
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