| Name | Gender | Pronounced | Usage |
|---|---|---|---|
| Clemens | KLE-mens (German) | German, Dutch, Swedish, Norwegian, Danish, Late Roman | |
| Alpertti | AHL-pert-tee | Finnish | |
| Cedar | SEE-dər | English (Rare) | |
| Crystal | KRIS-təl | English | |
| Konstantin | KAWN-stahn-teen (German), kahn-stahn-TEEN (Russian) | German, Hungarian, Russian, Serbian, Bulgarian, Macedonian | |
| Leevi | LE:-vee | Finnish |