| Hector | | HEK-tər (English) | English, French, Greek Mythology (Latinized), Arthurian Romance | |
| Igerna | | - | Arthurian Romance | |
| Igraine | | - | Arthurian Romance | |
| Iseult | | i-SOOLT (English), i-ZOOLT (English), EE-səlt (English) | Arthurian Romance | |
| Isolda | | i-ZOL-də (English), i-SOL-də (English) | Arthurian Romance | |
| Isolde | | i-ZOL-də (English), i-SOL-də (English), ee-ZAWL-du (German) | English (Rare), German, Arthurian Romance | |
| Kay (2) | | - | Welsh Mythology, Arthurian Romance | |
| Lancelot | | LAN-sə-laht (English) | Arthurian Romance | |
| Lot (2) | | - | Arthurian Romance | |
| Luned | | LIN-ed (Welsh) | Welsh, Welsh Mythology, Arthurian Romance | |
| Lunete | | - | Welsh Mythology, Arthurian Romance | |
| Medraut | | - | Welsh Mythology, Arthurian Romance | |
| Medrod | | - | Welsh Mythology, Arthurian Romance | |
| Merlin | | MUR-lin (English) | Arthurian Romance, English | |
| Modred | | - | Welsh Mythology, Arthurian Romance | |