Baby Names Boy Names Meaning of the Name Casmir Updated January 18, 2026 by Jennifer M. Casmir Gender: Male Origin: Polish Meaning: Peace Keeper ♥ Add to my Namelist What is the meaning of the name Casmir? The name Casmir is primarily a male name of Polish origin that means Peace Keeper. People who like the name Casmir also like: Theodore, Owen, Clay, Augustus, Suvan, Rhys, Alastair, Penelope, Wren, Adelaide, Carys, Lark, Saoirse, Clover Names like Casmir: Camira, Conor, Connery, Cashmere, Chinara, Connor, Chimere, Channer, Camara, Conary, Channary, Channery, Conner, Casimir, Cynara, Coniraya, Chinyere, Casimira, Conroy Stats for the Name Casmir Casmir is currently not in the top 100 on the Baby Names Popularity Charts Casmir is currently not ranked in U.S. births