| Ismael | | - | Spanish, Biblical Greek | |
| Israel | | IZ-ray-əl (English), IZ-ree-əl (English) | Jewish, English, Biblical, Biblical Greek | |
| Ithamar | | - | Biblical, Biblical Latin, Biblical Greek | |
| Kain | | - | Biblical Greek | |
| Kainan | | - | Biblical Greek | |
| Kandake | | - | Biblical, Biblical Greek | |
| Karpos | | - | Ancient Greek, Biblical Greek | |
| Kephas | | - | Biblical Greek | |
| Kleopas | | - | Biblical Greek | |
| Klopas | | - | Biblical Greek | |
| Kreskes | | - | Biblical Greek | |
| Kyros | | - | Ancient Greek, Biblical Greek | |
| Lazaros | | - | Biblical Greek | |
| Leia | | LAY-a (Popular Culture) | Biblical Greek, Popular Culture | |
| Leui | | - | Biblical Greek | |