| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 281 | Marrok | ArthurianLegend | A knight thought to be a werewolf. | M | |
| 282 | Matilda | ArthurianLegend | Mother of Merlin. | F | |
| 283 | Meleagant | ArthurianLegend | Kidnapped Guinevere. | M | |
| 284 | Melechan | ArthurianLegend | Mordred's son. | M | |
| 285 | Meliadus | ArthurianLegend | Tristan's father. | M | |
| 286 | Meliodas | ArthurianLegend | Tristan's father. | M | |
| 287 | Melwas | ArthurianLegend | Name of a king. | M | |
| 288 | Melyon | ArthurianLegend | Son of Mordred. | M | |
| 289 | Merlin | ArthurianLegend | Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor. | M | |
| 290 | Merlyn | ArthurianLegend | Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor. | M | |
| 291 | Modred | ArthurianLegend | Son/nephew of Arthur. | M | |
| 292 | Modron | ArthurianLegend | A goddess and possible precursor of Morgan le Fey. | F | |
| 293 | Morcades | ArthurianLegend | Sister of Arthur. | F | |
| 294 | Mordrain | ArthurianLegend | Name of a king. | M | |
| 295 | Mordred | ArthurianLegend | Son/nephew of Arthur. | M | |
| 296 | Morgan | ArthurianLegend | Enchantress half sister of Arthur. | F | |
| 297 | Morgan Tud | ArthurianLegend | A physician. | M | |
| 298 | Morgana | ArthurianLegend | Enchantress half sister of Arthur. | F | |
| 299 | Morgawse | ArthurianLegend | Mother of Gawain. | F | |
| 300 | Morguase | ArthurianLegend | Mother of Gawain. | F | |