| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 181 | Mabon | ArthurianLegend | A knight. | M | |
| 182 | Mabonaqain | ArthurianLegend | A knight. | M | |
| 183 | Mabuz | ArthurianLegend | Ruler of Death Castle. | M | |
| 184 | Mador | ArthurianLegend | Accuser of Guinevere. | M | |
| 185 | Maheloas | ArthurianLegend | Lord of the Isle of Glass. | M | |
| 186 | Maldue | ArthurianLegend | A wizard. | M | |
| 187 | Mariadok | ArthurianLegend | King Mark's servant. | M | |
| 188 | Mark | ArthurianLegend | Tristan's uncIe. | M | |
| 189 | Marrok | ArthurianLegend | A knight thought to be a werewolf. | M | |
| 190 | Meleagant | ArthurianLegend | Kidnapped Guinevere. | M | |
| 191 | Melechan | ArthurianLegend | Mordred's son. | M | |
| 192 | Meliadus | ArthurianLegend | Tristan's father. | M | |
| 193 | Meliodas | ArthurianLegend | Tristan's father. | M | |
| 194 | Melwas | ArthurianLegend | Name of a king. | M | |
| 195 | Melyon | ArthurianLegend | Son of Mordred. | M | |
| 196 | Merlin | ArthurianLegend | Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor. | M | |
| 197 | Merlyn | ArthurianLegend | Sea fortress. In Arthurian mythology the wizard Merlin was King Arthur's mentor. | M | |
| 198 | Modred | ArthurianLegend | Son/nephew of Arthur. | M | |
| 199 | Mordrain | ArthurianLegend | Name of a king. | M | |
| 200 | Mordred | ArthurianLegend | Son/nephew of Arthur. | M | |