| Marcellus | "YOUNG WARRIOR .VARIATIONS: MARCEAU,MARCEL,MARCELIN,MARCELLO." | Male |
| Marco | Warring | Male |
| Marcus | Hammer | Male |
| Marek | Warlike | Male |
| Mario | Warring | Male |
| Marius | Hammer | Male |
| Mark | Tristan's Uncle | Male |
| Marley | From The March Meadow | Male |
| Marlon | Little Falcon | Male |
| Marlow | From The Hill By The Lake. Marshy Meadow. | Male |
| Marlowe | Variant Of Marlene Woman From Magdala. | Female |
| Maro | Myself | Male |
| Marshall | Steward Caretaker Of Horses. | Male |
| Martin | Warrior Of Mars. | Male |
| Marvin | Lives By The Sea | Male |
| Mason | Stone Worker | Male |
| Mateo | God's Gift | Male |
| Mathias | "Variant Of Matthias, Biblical Name Meaning" | Male |
| Matt | Gift Of God. | Male |
| Matteo | Variant Of Matthew. Gift Of God. | Male |
| Matthew | Gift Of Jehovah. In The Bible Mathew Was One Of The 12 Apostles. He Wrote The First Gospel Account Of The Life Of Jesus. | Male |
| Matthias | Gift Of God. | Male |
| Mattias | Gift From God | Male |
| Maurice | Dark-Skinned: A Moor. | Male |
| Maverick | When A Nineteenth-Century American Named Maverick Refused To Brand His Calves As Other Ranchers Did: His Name Came To Signify An Independent Man Who Avoids Conformity. | Male |