| 86318 | Mailu (Ilai Dialect) | ilolo | | | Thomson (1975) | |
| 86592 | Mailu (Island Dialect) | moru | | | Thomson (1975) | |
| 21559 | Mairasi | neŋguvu | | | Voorhoeve (1975) | |
| 221189 | Maiwa | kʷi'.unwa | | | SIL (1973) | |
| 217786 | Maiwa | kuiyunwa | Daga - iánua | | SIL (1967) | |
| 36271 | Makasae | d'aʔɛ (O) dau | | | Stokhof (1975) | |
| 21199 | Maklew | ala | | | Voorhoeve (1975) | |
| 139559 | Mala | -moak | | | Z'graggen (1980) | head |
| 139555 | Malas | kumu | | | Z'graggen (1980) | head |
| 176592 | Male | gati | | | Z'graggen (1980) | head |
| 233316 | Mali (Arambum Dialect) | uʷʌski | | | SIL (1985) | |
| 233201 | Mali (Makunga Dialect) | aŋʌpʌski | | | SIL (1985) | |
| 155105 | Mamaa | kʌi | | | McElhanon and Voorhoeve (1970) | head |
| 155110 | Ma Manda | nɛmbɨ | | | McElhanon and Voorhoeve (1970) | head |
| 22811 | Mander | nebar | | | Voorhoeve (1975) | |
| 201357 | Mandobo Atas | kebiɑn | | | Voorhoeve (2000) | |
| 25549 | Mandobo Atas | kembyan | | | Voorhoeve (1975) | |
| 155040 | Mandobo Atas | kembian | | | McElhanon and Voorhoeve (1970) | head |
| 19189 | Manem | bagar | | | Voorhoeve (1975) | |
| 29493 | Manem | bagar | | | Voorhoeve (1971) | |
| 261211 | Manep | kumu | | | Pick (2019) | head |
| 20441 | Manikion | mogt | | | Voorhoeve (1975) | |
| 91616 | Mape | kpâru- | (its) head | | McElhanon (1967) | (its) head |
| 155140 | Mape (East Dialect) | kporuʔ | | | McElhanon and Voorhoeve (1970) | head |
| 155138 | Mape (Naga Dialect) | wɔtɔʔ | | | McElhanon and Voorhoeve (1970) | head |
| 155139 | Mape (West Dialect) | kporuʔ | | | McElhanon and Voorhoeve (1970) | head |
| 24861 | Marau | riuŋkami | | | Voorhoeve (1975) | |
| 257518 | Maria (Maiagolo Dialect) | aˈda | | | Dutton (1970) | head |
| 257520 | Maria (Maranomu Dialect) | aˈda | | | Dutton (1970) | head |
| 257522 | Maria (Uderi Dialect) | aˈda | | | Dutton (1970) | head |
| 257525 | Maria | ˈkiriʔa | | | Dutton (1970) | head |
| 257524 | Maria | aˈda | | | Dutton (1970) | head |
| 22321 | Marind | pa: | | | Voorhoeve (1975) | |
| 155067 | Marind (Gawir Dialect) | pa | | | McElhanon and Voorhoeve (1970) | head |
| 21920 | Marind, Bian | pa: | | | Voorhoeve (1975) | |
| 120216 | Matepi | mogupɛ | | | Z'graggen (1980) | head |
| 120217 | Matepi | tevu- | | | Z'graggen (1980) | head |
| 139563 | Mauwake | wosa | | | Z'graggen (1980) | head |
| 139567 | Mawak | aniŋgen | | | Z'graggen (1980) | head |
| 120214 | Mawan | tawu | | | Z'graggen (1980) | head |
| 120213 | Mawan | iro- | | | Z'graggen (1980) | head |
| 25749 | Mawes | defar | | | Voorhoeve (1975) | |
| 77804 | Maybrat | -ana | | | Dol (2007) | |
| 77098 | Mbaniata | uombo | head | | Tryon & Hackman (1983) | |
| 77099 | Mbaniata | uo | head | | Tryon & Hackman (1983) | |
| 76839 | Mbaniata (Lokuru Dialect) | uɔ | head | | Tryon & Hackman (1983) | |
| 76571 | Mbilua | lezu | head | | Tryon & Hackman (1983) | |
| 76289 | Mbilua (Ndovele Dialect) | lezu | head | | Tryon & Hackman (1983) | |
| 243237 | Mehek | terfa | | | Laycock (1968) | |
| 25869 | Mekwei | yekembu | | | Voorhoeve (1975) | |
