| Masiela | Woman | Spanish Names |
| Masih | Man | Persian Names |
| Maso | Man | Italian Names |
| Mason | Man | English Names |
| Masood | Man | Arabic Names |
| Masoud | Man | Arabic Names |
| Massachusetts | Unisex | Native American - Massachusett Names |
| Massalona | Woman | American Names |
| Massey | Unisex | English Names |
| Massika | Unisex | Native American - Sac and Fox Nation Names |
| Massimo | Man | Italian Names |
| Maston | Man | English Names |
| Masud | Man | Arabic Names |
| Masumi | Woman | Japanese Names |
| Masuyo | Woman | Japanese Names |
| Mata | Unisex | Spanish Names |
| Matan | Man | Hebrew Names |
| Matana | Woman | Hebrew Names |
| Matar | Man | Hebrew Names |
| Matat | Woman | Hebrew Names |