Kaja is a concise, two-syllable name of Slavic origin—pronounced KAH-yah—that began life as a diminutive of Poland’s Katarzyna (the equivalent of Catherine) and later found parallel use in German and Scandinavian contexts. Rooted in the Greek katherine, meaning “pure,” it carries a quietly classical air without feeling overly ornate. In the United States, Kaja has hovered in the lower 900s of the popularity charts throughout the early 21st century, striking a modest balance between familiarity and distinctiveness. Its clear phonetic structure and pan-European pedigree appeal to parents seeking a name that feels both time-honored and refreshingly unpretentious—an elegant choice for a modern family.
| Kaja Kallas is an Estonian diplomat who became Estonia's first female prime minister and the European Union's foreign policy chief. |
| Kaja Eržen - Kaja Erzen is a Slovenian footballer who plays right back for Ternana and the Slovenia women's national team. |
| Kaja Gunnufsen is a Norwegian singer and songwriter known for her lyrics about internet culture and millennial life. |
| Vesna Milacic, known as Kaja, is a Montenegrin singer and songwriter. |
| Kaja Grobelna is a Belgian volleyball player of Polish origin who plays as an opposite spiker. |