| CALLEIGH f English (Rare) |
| CALLIE f English |
| CAREEN f English (Rare) |
| CARI f English |
| CARL m Danish, English, German, Norwegian, Swedish |
| CARLA f Catalan, Dutch, English, German, Italian, Portuguese, Spanish |
| CARLENE f English |
| CARLES m Catalan |
| CARLEY f English (Modern) |
| CARLIE f English |
| CARLINHOS m Portuguese |
| CARLISA f English (Rare) |
| CARLITO m Portuguese, Spanish |
| CARLITOS m Portuguese, Spanish |
| CARLMAN m Ancient Germanic |
| CARLO m Italian |
| CARLOMAN m Ancient Germanic, History |
| CARLOS m Catalan, Portuguese, Spanish |
| CARLOTA f Portuguese, Spanish |
| CARLOTTA f Italian |
| CARLY f English |
| CARLYN f English |
| CAROL (1) f & m English |
| CAROL (2) m Romanian |
| CAROLA f Dutch, German, Italian, Swedish |
| CAROLE f French |
| CAROLIEN f Dutch |
| CAROLIN f German |
| CAROLINA f English, Ancient Germanic (Latinized), Italian, Portuguese, Spanish, Swedish |
| CAROLINE f Danish, Dutch, English, French, German, Norwegian, Swedish |
| CAROLUS m Ancient Germanic (Latinized) |
| CAROLYN f English |
| CARREEN f English (Rare) |
| CARRIE f English |
| CARRY f English |
| CARYL f English |
| CHARLA f English |
| CHARLEEN f English |
| CHARLEMAGNE m History |
| CHARLENE f English |
| CHARLES m English, French |
| CHARLEY m & f English |
| CHARLIE m & f English |
| CHARLINE f French |
| CHARLIZE f Afrikaans |
| CHARLOT m French |
| CHARLOTTA f Swedish |
| CHARLOTTE f Danish, Dutch, English, French, German, Norwegian, Swedish |
| CHAS m English |
| CHAZ m English |
| CHIP m English |
| CHUCK m English |
| GIANCARLO m Italian |
| INA f Danish, English, German, Norwegian, Swedish |
| KAARLE m Finnish |
| KAARLO m Finnish |
| KÁJA f Czech |
| KALE m Hawaiian |
| KALLE m Finnish, Swedish |
| KALLIE f English |
| KARCSI m Hungarian |
| KAREL m Czech, Dutch, Slovene |
| KARL m Danish, English, Finnish, German, Ancient Germanic, Norwegian, Swedish |
| KARLA f Croatian, Danish, German, Norwegian, Swedish |
| KARLEE f English (Modern) |
| KARLENE f English |
| KARLMANN m German |
| KARLO m Croatian |
| KARLY f English (Modern) |
| KAROL m Polish, Slovak, Slovene |
| KAROLA f German, Hungarian |
| KAROLIINA f Finnish |
| KAROLÍNA f Czech |
| KAROLINA f Croatian, Danish, German, Hungarian, Lithuanian, Macedonian, Norwegian, Polish, Slovene, Swedish |
| KAROLINE f Danish, German, Norwegian |
| KAROLIS m Lithuanian |
| KÁROLY m Hungarian |
| KAROLYN f English |
| KARRIE f English |
| LIEN f Dutch |
| LIESELOTTE f German |
| LIINA f Finnish |
| LILI f Hungarian |
| LILO f German |
| LINA (2) f Croatian, Danish, English, Italian, Lithuanian, Norwegian, Swedish |
| LINE f Danish, Norwegian |
| LISELOT f Dutch |
| LISELOTTE f Danish, German |
| LOTTA f Finnish, Swedish |
| LOTTE f Danish, Dutch, German |
| LOTTIE f English |
| SÉARLAIT f Irish |
| SÉARLAS m Irish |
| SHARLA f English |
| SHARLEEN f English |
| SHARLENE f English |
| SIARL m Welsh |
| SJAREL m Limburgish |
| TOTTIE f English |
| TOTTY f English |
