Casimir
/K-AE-Z-IH-M-IH-R/
Proclaimer of peace, from the Slavic name Kazimierz, joining a root of announcing or destroying strife to mir (peace). Borne by a beloved royal saint of Poland and Lithuania, the name marks its bearer as one who heralds harmony, a peacemaker remembered for purity and quiet devotion.
Get Casimir's full report — patron saint, feast day & a portrait — freeQuick — what every Christian parent asks about Casimir:
How well does Casimir fit your family?
This page tells you what Casimir means. The app tells you whether it's right for your baby — scored against your family & your heritage, and your baby's birth details.
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Six signals — scored for your family & heritage, not in the abstract:
Meaning & origin
Yes — Casimir is a Christian boy name of Slavic origin, meaning “Proclaimer of peace, from the Slavic name Kazimierz, joining a root of announcing or destroying strife to mir (peace). Borne by a beloved royal saint of Poland and Lithuania, the name marks its bearer as one who heralds harmony, a peacemaker remembered for purity and quiet devotion.”.
Casimir is a boy's name of Slavic origin, traditionally used in Christian families. The name means "Proclaimer of peace, from the Slavic name Kazimierz, joining a root of announcing or destroying strife to mir (peace). Borne by a beloved royal saint of Poland and Lithuania, the name marks its bearer as one who heralds harmony, a peacemaker remembered for purity and quiet devotion." and belongs to the Peace cluster — names meaning calm, serenity, and inner stillness.
Common among European families, Casimir carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.
The patron saint & feast day behind Casimir
Many Christian names carry a patron saint and a feast day (name day) — a tradition of choosing a name for the saint a child is born near, or one the family holds dear. Casimir lives in this tradition of meaning and heritage.
NameRoot connects the dots. See Casimir's patron saint, its feast day, and whether it aligns with your baby's birth — alongside its full family score.
See Casimir's saint & feast day →What does Casimir's numerology say?
Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Casimir resonates in either tradition.
Casimir's destiny number is 9 — but a number only matters in context. The app matches it to your family's own numbers for a real compatibility read. See Casimir's full reading →
Does Casimir go with your family's names?
Casimir breaks into 7 sounds: /K-AE-Z-IH-M-IH-R/. The real test isn't how it sounds alone — it's how it sounds beside the names already in your family: yours, your partner's, and any brothers or sisters. NameRoot scores that harmony, so Casimir sits naturally next to a Mum and Dad like Michael & Anna, or a big sister named Gianna — no awkward clashes, no two names that blur together. Hear Casimir beside your family's names →
Nicknames
Common affectionate forms of Casimir — useful for everyday family conversation, early childhood, or as standalone given names themselves.
Names similar to Casimir
If Casimir resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.
From the same tradition
Other Christian boy names, common in European families
Sharing the same meaning
Other Christian boy names from the Peace cluster
Names that sound similar
Christian boy names that open with the same syllables as Casimir
Explore more names
Keep exploring names like Casimir — by tradition, by meaning, or by first letter.
Common questions about Casimir
What does the name Casimir mean?
Casimir means "Proclaimer of peace, from the Slavic name Kazimierz, joining a root of announcing or destroying strife to mir (peace). Borne by a beloved royal saint of Poland and Lithuania, the name marks its bearer as one who heralds harmony, a peacemaker remembered for purity and quiet devotion.." It is a boy name of Slavic origin, traditionally used in Christian families.
Is Casimir a boy or girl name?
Casimir is most commonly used as a boy name.
What is the origin of the name Casimir?
Casimir is of Slavic origin, used in Christian tradition, commonly among European families.
Is Casimir a Christian name?
Yes. Casimir is a boy name traditionally used in Christian families, of Slavic origin.
What does Casimir mean in Slavic?
Casimir originates from Slavic, where it means "Proclaimer of peace, from the Slavic name Kazimierz, joining a root of announcing or destroying strife to mir (peace). Borne by a beloved royal saint of Poland and Lithuania, the name marks its bearer as one who heralds harmony, a peacemaker remembered for purity and quiet devotion.."
What are common nicknames for Casimir?
Common short forms of Casimir include Casi.
What is the numerology of Casimir?
Casimir has a Pythagorean destiny number of 9 — compassion and humanitarian service.
Is Casimir a saint's name?
Yes — Casimir is honoured as a Christian saint's name, linked to the patron saint of Poland.
See how Casimir scores for your family
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