| Name | Meaning | Gender | Origin |
|---|
| Lycurgus | Myth Name (A King Of The Edones) | Male | Greek |
| Lynceus | Myth Name (An Argonaut) | Male | Greek |
| Macauslan | Son Of Absalon | Male | Scottish |
| Maccus | Son Of Gus | Male | Anglo |
| Magnus | Great | Male | Danish |
| Mannuss | Great | Male | Irish |
| Manus | Surname. | Male | Irish |
| Maponus | God Of Youth And Music | Male | Anglo |
| Marcellus | "YOUNG WARRIOR .VARIATIONS: MARCEAU,MARCEL,MARCELIN,MARCELLO." | Male | Latin |
| Marcelus | Warlike One | Male | English |
| Marcus | Hammer | Male | Gaelic |
| Marius | Hammer | Male | Romanian |
| Markus | Of Mars. The Roman Fertility God Mars For Whom March Was Named. | Male | German |
| Mars Leucetius | God Worshipped At Bath | Male | Anglo |
| Marsilius | Legend Name | Male | French |
| Mateusz | Variant Of Matthew. | Male | English |
| Matsushita | Below The Pine Suzuki | Male | Japanese |
| Mausi | Plucks Flowers | Female | Native American |
| Maximus | Greatest. | Male | Irish |
| Meccus | Son Of Gus | Male | Anglo |
| Medus | Myth Name (Son Of Medea By Aegeus) | Male | Greek |
| Medusa | Cunning | Female | Greek |
| Melampus | Myth Name (Seer) | Male | Greek |
| Melanippus | Myth Name (Helps Defend Thebes Against The Attackers) | Male | Greek |
| Melanthius | Myth Name (Sides With Penelope's Suitors Against His Master Odysseus) | Male | Greek |
| Meliadus | Tristan's Father | Male | Arthurian |
| Melusina | Dark Skinned | Female | French |
| Menelaus | Myth Name (Brother Of Agamemnon) | Male | Greek |
| Menoeceus | Myth Name (Father Of Jocasta) | Male | Greek |
| Mezentius | Myth Name | Male | Greek |