| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Kay (2) | - | Welsh Mythology, Arthurian Romance | ||
| Kay (3) | KIE (Swedish) | Frisian, German, Swedish, Norwegian, Danish | ||
| Kayetan | KAH-ye-tahn | German | ||
| Kayin (1) | - | Western African, Yoruba | ||
| Kayin (2) | - | Biblical Hebrew | ||
| Kayleah | KAY-lee | English (Rare) | ||
| Kayleen | KAY-leen | English (Rare) | ||
| Kayly | KAY-lee | English (Rare) | ||
| Kayode | - | Western African, Yoruba | ||
| KazimÍR | - | Czech, Slovak, Hungarian | ||
| Kazimieras | - | Lithuanian | ||
| Kazimir | kah-zee-MEER (Russian) | Russian, Medieval Slavic | ||
| Kazue | kah-zoo-e | Japanese | ||
| Kazuki | kah-zoo-kee | Japanese | ||
| Kazuko | kah-zoo-ko | Japanese |