| Kasey | | KAY-see | English | |
| Kassandra | | kə-SAN-drə (English) | Greek Mythology, Ancient Greek, English (Modern) | |
| Kassia | | KA-shə | English (Rare) | |
| Kassidy | | KAS-i-dee | English (Modern) | |
| Kassy | | KAS-ee | English (Modern) | |
| Kat | | KAT | English | |
| Kate | | KAYT (English) | English, Croatian | |
| Katee | | KAY-tee | English (Rare) | |
| Katelin | | KAYT-lin | English (Modern) | |
| Katelyn | | KAYT-lin | English (Modern) | |
| Katelynn | | KAYT-lin | English (Modern) | |
| Katey | | KAY-tee | English | |
| Katharine | | KATH-ə-rin (English), KATH-rin (English), kah-tah-REE-nə (German) | English, German | |
| Katharyn | | KATH-ə-rin | English | |
| Katherina | | kath-ə-REE-nə (English), kə-THREE-nə (English), kah-te-REE-nah (German) | English (Rare), German | |