Boy Name · English Origin
Casimer
Last reviewed: June 2026
Casimer is a boy baby name of English origin, meaning "Strong-willed". It currently sits in the Rare tier of US baby names for 2026, and parents who love Casimer often also consider Casimiro.
Names like Casimer
Frequently asked about Casimer
What does the name Casimer mean?
Casimer means "Strong-willed" and is of English origin.
What is the origin of Casimer?
Casimer originates in English naming tradition.
How do you pronounce Casimer?
Casimer has 7 letters and is most commonly stressed on the first syllable.
Is Casimer a boy's or girl's name?
Casimer is primarily used as a boy's name in US records.
How popular is Casimer in 2026?
In our 2026 popularity tracker, Casimer sits in the Rare tier — an uncommon, standout choice.
What names are similar to Casimer?
Names that share Casimer's sound and style include Casimiro, Casimir, Carter, Casper, Carver.