US Popularity Rank: 19410

Origin: Slavic

Meaning: Proclaimer of peace

Kasimir is a boy’s name of Slavic origin, meaning “proclaimer of peace.” It has many variants, including Kazimierz (Polish), Casimir (English and Latin), and Kazimír, among others. It derives from the words kazać, meaning “to preach,” and mir, meaning “peace.” If you want your little one to be a peacemaker among their friends or siblings, this could be the perfect name!