| 87037 | Mailu (Borebo Dialect) | omu | | | Thomson (1975) | |
| 88407 | Mailu (Darava Dialect) | omu | | | Thomson (1975) | |
| 88133 | Mailu (Delebai Dialect) | omu | | | Thomson (1975) | |
| 87311 | Mailu (Domara Dialect) | omu | | | Thomson (1975) | |
| 87859 | Mailu (Geagea Dialect) | omu | | | Thomson (1975) | |
| 86489 | Mailu (Ilai Dialect) | omu | | | Thomson (1975) | |
| 86763 | Mailu (Island Dialect) | omu | | | Thomson (1975) | |
| 21564 | Mairasi | negwata | | | Voorhoeve (1975) | |
| 221263 | Maiwa | i'vi wa | | | SIL (1973) | |
| 21204 | Maklew | ŋeŋele | | | Voorhoeve (1975) | |
| 140891 | Mala | -num | | | Z'graggen (1980) | (name) |
| 140886 | Malas | uni:m | | | Z'graggen (1980) | (name) |
| 177912 | Male | doŋom | | | Z'graggen (1980) | name |
| 233158 | Mali (Arambum Dialect) | ŋʌrɩpkiʰ | | | SIL (1985) | |
| 233260 | Mali (Makunga Dialect) | aŋařɛpki | | | SIL (1985) | |
| 157923 | Mamaa | utaŋ | | | McElhanon and Voorhoeve (1970) | name |
| 157928 | Ma Manda | yip | | | McElhanon and Voorhoeve (1970) | name |
| 237433 | Manambu | cɨ | | | Foley (2005) | |
| 22816 | Mander | busene | | | Voorhoeve (1975) | |
| 25554 | Mandobo Atas | üp | | | Voorhoeve (1975) | |
| 231430 | Mandobo Atas | üp | | | Healey (1970) | |
| 157871 | Mandobo Atas | üp | | | McElhanon and Voorhoeve (1970) | name |
| 201375 | Mandobo Atas | üp | | | Voorhoeve (2000) | |
| 231614 | Mandobo Atas (Kwem Dialect) | üp | | | Healey (1970) | |
| 201456 | Mandobo Atas (Yonggom Dialect) | ip | | | Voorhoeve (2000) | |
| 261176 | Manep | unim | | | Pick (2019) | name |
| 20446 | Manikion | moxo | | | Voorhoeve (1975) | |
| 91168 | Mape | dziŋâ- | (its) name | | McElhanon (1967) | (its) name |
| 157958 | Mape (East Dialect) | dziŋa | | | McElhanon and Voorhoeve (1970) | name |
| 157956 | Mape (Naga Dialect) | dzoŋa | | | McElhanon and Voorhoeve (1970) | name |
| 157957 | Mape (West Dialect) | dziŋa | | | McElhanon and Voorhoeve (1970) | name |
| 236871 | Marangis | wi | | | Foley (2005) | |
| 259727 | Maria (Maiagolo Dialect) | ˈroʔaba | | | Dutton (1970) | [(name)] |
| 259729 | Maria (Maranomu Dialect) | ˈroʔa | | | Dutton (1970) | [(name)] |
| 259731 | Maria (Uderi Dialect) | ˈroʔaba | | | Dutton (1970) | [(name)] |
| 259733 | Maria | roʔa | | | Dutton (1970) | [(name)] |
| 22326 | Marind | igiz | | | Voorhoeve (1975) | |
| 21925 | Marind, Bian | igiz | | | Voorhoeve (1975) | |
| 121671 | Matepi | wani- | | | Z'graggen (1980) | name |
| 140895 | Mauwake | unum(a) | | | Z'graggen (1980) | (name) |
| 140899 | Mawak | unim | | | Z'graggen (1980) | (name) |
| 121669 | Mawan | wani- | | | Z'graggen (1980) | name |
| 25754 | Mawes | dimane | | | Voorhoeve (1975) | |
| 77885 | Maybrat | -asom | | | Dol (2007) | |
| 77005 | Mbaniata | nini | name | | Tryon & Hackman (1983) | |
| 76680 | Mbaniata (Lokuru Dialect) | nini | name | | Tryon & Hackman (1983) | |
| 76466 | Mbilua | ŋi | name | | Tryon & Hackman (1983) | |
| 76382 | Mbilua (Ndovele Dialect) | ŋi | name | | Tryon & Hackman (1983) | |
| 236870 | Mbore | i | | | Foley (2005) | |
| 25874 | Mekwei | siu | | | Voorhoeve (1975) | |
