♂

• Kallias - Beauty, Greek
• Kees - Horned, Dutch
• Klemens - Clemency, Danish / German / Polish / Swedish

♀

• Kalliope - Beautiful voice, Greek
• Kassandra - Shining upon man, Greek
• Katalin - Pure, Basque / Hungarian
• Katharine/Katherine - Pure, English
• Katrine - Pure, Danish / Norwegian
• Kerensa - Loving, Cornish
• Keturah - Incence, Hebrew
• Kim - Gold or metal, Vietnamese
• Kinneret - Harp, Hebrew
• Klara - Bright or famous, Croatian / Danish / German / Norwegian / Polish / Russian / Slovene / Swedish / Ukrainian
• Kleio - Glory, Greek