| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 221 | Isoude | ArthurianLegend | Lover of Tristan. | F | |
| 222 | Ither | ArthurianLegend | Killed by Percival. | M | |
| 223 | Jenifer | ArthurianLegend | Variant of Guinevere: Fair one. Guinevere was King Arthur's mythological queen. | F | |
| 224 | Jennifer | ArthurianLegend | Variant of Guinevere: Fair one. Guinevere was King Arthur's mythological queen. | F | |
| 225 | Johfrit | ArthurianLegend | A knight. | M | |
| 226 | Kaherdin | ArthurianLegend | Brother of Isolde. | M | |
| 227 | Kanelinqes | ArthurianLegend | Father of Tristan. | M | |
| 228 | Kardeiz | ArthurianLegend | Son of Percival. | M | |
| 229 | Kay | ArthurianLegend | Keeper of the keys. Also an abbreviation of Katherine: Pure. Sir Kay was one of King Arthur's knights. | F | |
| 230 | Kay | ArthurianLegend | Son of Ector. | M | |
| 231 | Ke | ArthurianLegend | Arthur's brother. | M | |
| 232 | Kei | ArthurianLegend | Son of Ector. | M | |
| 233 | Lailoken | ArthurianLegend | A fool. | M | |
| 234 | Lamorak | ArthurianLegend | Brother of Percival. | M | |
| 235 | Lamorat | ArthurianLegend | Brother of Percival. | M | |
| 236 | Lancelot | ArthurianLegend | Knight of Arthur and lover of Guinevere. | M | |
| 237 | Laudegrance | ArthurianLegend | Father of Guinevere. | M | |
| 238 | Laudine | ArthurianLegend | A widow. | F | |
| 239 | Launcelot | ArthurianLegend | Knight of Arthur and lover of Guinevere. | M | |
| 240 | Launfal | ArthurianLegend | A knight. | M | |