| Kai-Adrian | m | Russian | Kai-Adrian is a double name combining Kai ("the fighter") and Adrian ("the man from Had… |
| Kamillia | f | Latin | Kamillia is a rare female first name understood as the English form of Camilia |
| Kandida | f | Latin | Kandida is a feminine form of the name Candida, which is a female variant of the Roman … |
| Kapitolina | f | Latin | Kapitolina (Капитолина) is an East Slavic and Russian variant of the name Capitolina, w… |
| Katerina | f | Russian | The name Katerina is commonly translated as "the Pure." This meaning was initially shap… |
| Katia | f | Italian | The name Katia is regarded as a diminutive of Katja and Katya and has its roots in Jeka… |
| Katjuscha | f | Russian | Katjuscha (Катюша) is a diminutive form of Jekaterina (Cyrillic Екатерина), the Russian… |
| Katjuschka | f | Russian | Katjuschka is a rare pet form of Jekaterina (Cyrillic Екатерина), the Russian equivalen… |
| Katya | f | Russian | The name Katya (Катя) is often understood as a diminutive of Jekaterina or Yekaterina, … |
| Kazbek | m | Arabic | Kazbek is a boy's name that originates from the Caucasus |
| Keli | m | Russian | The name Keli (Къэли) for boys is derived from Chukchi and literally means 'the cap' |
| Kersten-Torben | m | Russian | Etymology: German, Russian |
| Kir | m | Russian | The name Kir, used for boys, is a Russian abbreviation of Cyrill or Cyrus |
| Kira-Bianca | f | Greek | The name Kira-Bianca is made up of two parts |
| Kira-Marie | f | Aramaic | Kira-Marie is a double name combining Kira ("the mistress") and Marie ("the beloved") |
| Kira-Sibylle | f | Latin | Kira-Sibylle is a double name combining Kira ("the mistress") and Sibylle ("the prophet… |
| Kisa | f | Latin | Kisa is derived as a pet form of Christina, a feminine variant of the name Christianus |
| Kolja | m | Polish | The name Kolja (Коля) is a Russian diminutive of Nikolai or Nikolaj and is derived from… |
| Korvin | m | Latin | Korvin is a male first name that is understood as a short form of Korbinian |
| Kosma | f | Polish | Kosma is both a female first name in German and a masculine form in Polish and Russian |
| Kosta | m | Latin | Kosta represents a South Slavic diminutive of the Latin name Konstantin, which means "t… |
| Krispin | m | Latin | Krispin is the Croatian, Russian (Криспин), and Ukrainian (Кріспін) variant of the name… |
| Kristinka | f | Latin | Kristinka is a South Slavic variant of the name Kristina, which is an alternative spell… |
| Kristov | m | Russian | The name Kristov (pronounced Kristow) is a South Slavic variation of the name Christoph… |
| Ksenija | f | Russian | The name Ksenija is a South Slavic and Latvian variant of the Greek Xenia, which means … |
| Kseniya | f | Russian | Kseniya (Russian Ксения, Belarusian/Ukrainian Ксенія) is a Russian derivative of the Gr… |