| ANNELIEN f Dutch |
| ARINA f Russian |
| ARISHA f Russian |
| ARJA f Finnish |
| CALLEIGH f English (Rare) |
| CALLIE f English |
| CAREEN f English (Rare) |
| CARI f English |
| CARL m German, Swedish, Norwegian, Danish, English |
| CARLA f Italian, Portuguese, Spanish, English, German, Dutch |
| CARLENE f English |
| CARLES m Catalan |
| CARLEY f English (Modern) |
| CARLIE f English |
| CARLINHOS m Portuguese |
| CARLISA f English (Rare) |
| CARLITO m Spanish, Portuguese |
| CARLITOS m Spanish, Portuguese |
| CARLMAN m Ancient Germanic |
| CARLO m Italian |
| CARLOMAN m History, Ancient Germanic |
| CARLOS m Spanish, Portuguese |
| CARLOTA f Spanish, Portuguese |
| CARLOTTA f Italian |
| CARLY f English |
| CARLYN f English |
| CAROL (1) f & m English |
| CAROL (2) m Romanian |
| CAROLA f Italian, German, Dutch, Swedish |
| CAROLE f French |
| CAROLIEN f Dutch |
| CAROLIN f German |
| CAROLINA f Italian, Spanish, Portuguese, English, Swedish |
| CAROLINE f French, English, German, Swedish, Norwegian, Danish, Dutch |
| 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 English (Modern) |
| CHARLOT m French |
| CHARLOTTA f Swedish |
| CHARLOTTE f French, English, German, Swedish, Norwegian, Danish, Dutch |
| CHAS m English |
| CHAZ m English |
| CHIP m English |
| CHUCK m English |
| EIREEN f Irish |
| EIRENE f Greek Mythology, Ancient Greek |
| ENA (2) f Croatian |
| ERJA f Finnish |
| GIANCARLO m Italian |
| IRA (2) f Russian |
| IRÉN f Hungarian |
| IRENA f Polish, Czech, Slovene, Croatian, Serbian, Dutch, Lithuanian |
| IRÈNE f French |
| IRENE f English, Italian, Spanish, Portuguese, Swedish, Norwegian, Danish, Finnish, German, Ancient Greek (Latinized), Greek Mythology (Latinized) |
| IRENKA f Polish, Czech |
| IRIA f Portuguese, Galician |
| IRINA f Russian, Bulgarian, Macedonian, Romanian, Finnish |
| IRINUSHKA f Russian |
| IRJA f Finnish |
| IRYNA f Ukrainian |
| KAARLE m Finnish |
| KAARLO m Finnish |
| KÁJA f Czech |
| KAJA (2) f Polish |
| KALE m Hawaiian |
| KALLE m Swedish, Finnish |
| KALLIE f English |
| KARCSI m Hungarian |
| KAREL m Dutch, Czech, Slovene |
| KARL m German, Swedish, Norwegian, Danish, English, Finnish, Ancient Germanic |
| KARLA f German, Swedish, Norwegian, Danish, Croatian |
| KARLEE f English (Modern) |
| KARLENE f English |
| KARLMANN m German |
| KARLO m Croatian |
| KARLY f English (Modern) |
| KAROL m Polish, Slovak, Slovene |
| KAROLA f Hungarian, German |
| KAROLIINA f Finnish |
| KAROLÍNA f Czech |
| KAROLINA f Polish, Swedish, Norwegian, Danish, Hungarian, Slovene, Croatian, Macedonian, Lithuanian, German |
| KAROLINE f German, Danish, Norwegian |
| KAROLIS m Lithuanian |
| KÁROLY m Hungarian |
| KAROLYN f English |
| KARRIE f English |
| LIEN f Dutch |
| LIESELOTTE f German |
| LIINA f Finnish |
| LILO f German |
| LISELOT f Dutch |
| LISELOTTE f German, Danish |
| LOTTA f Swedish, Finnish |
| LOTTE f German, Dutch, Danish |
| LOTTIE f English |
| SÉARLAIT f Irish |
| SÉARLAS m Irish |
| SHARLA f English |
| SHARLEEN f English |
| SHARLENE f English |
| SIARL m Welsh |
| SJAREL m Limburgish |
| TEÀRLACH m Scottish |
| TEÀRLAG f Scottish |
| TOTTIE f English |
| TOTTY f English |
