| 88175 | Mailu (Delebai Dialect) | eva | close | | Thomson (1975) | |
| 87353 | Mailu (Domara Dialect) | eva | close | | Thomson (1975) | |
| 87354 | Mailu (Domara Dialect) | ne | further | | Thomson (1975) | |
| 87901 | Mailu (Geagea Dialect) | eva | close | | Thomson (1975) | |
| 87902 | Mailu (Geagea Dialect) | ne | further | | Thomson (1975) | |
| 86531 | Mailu (Ilai Dialect) | eva | close | | Thomson (1975) | |
| 86532 | Mailu (Ilai Dialect) | ne | further | | Thomson (1975) | |
| 86806 | Mailu (Island Dialect) | ne | further | | Thomson (1975) | |
| 86805 | Mailu (Island Dialect) | eva | close | | Thomson (1975) | |
| 221314 | Maiwa | mame | | | SIL (1973) | |
| 144762 | Mala | ɔn | | | Z'graggen (1980) | this |
| 144757 | Malas | ke | | | Z'graggen (1980) | this |
| 181779 | Male | ge | | | Z'graggen (1980) | this |
| 201392 | Mandobo Atas | mene | | | Voorhoeve (2000) | |
| 231360 | Mandobo Atas | mene | | | Healey (1970) | |
| 231544 | Mandobo Atas (Kwem Dialect) | mene | | | Healey (1970) | |
| 201474 | Mandobo Atas (Yonggom Dialect) | mene | | | Voorhoeve (2000) | |
| 90538 | Mape | âi | this | | McElhanon (1967) | this |
| 125989 | Matepi | ai | | | Z'graggen (1980) | this |
| 144767 | Mauwake | nin | | | Z'graggen (1980) | this |
| 144771 | Mawak | uwɛ | | | Z'graggen (1980) | this |
| 125987 | Mawan | ɛnɛnɛ | | | Z'graggen (1980) | this |
| 76933 | Mbaniata | ndeno | this | | Tryon & Hackman (1983) | |
| 76932 | Mbaniata | ndezo | this | | Tryon & Hackman (1983) | |
| 76799 | Mbaniata (Lokuru Dialect) | ŋɔndɛŋɔ | this | | Tryon & Hackman (1983) | |
| 76583 | Mbilua | komi | this | | Tryon & Hackman (1983) | |
| 76379 | Mbilua (Ndovele Dialect) | komi | this | | Tryon & Hackman (1983) | |
| 313 | Mena | ɛnaᵘ | | | Franklin (1973) | |
| 4841 | Menya | ta | | | Lloyd (1973) | |
| 90532 | Mesem | wi | this | | McElhanon (1967) | this |
| 144766 | Miani | onɛ | | | Z'graggen (1980) | this |
| 144765 | Miani | oᵬɛ | | | Z'graggen (1980) | this |
| 218358 | Migabac | eja | | | SIL (1975) | |
| 181761 | Migum | eno | | | Z'graggen (1980) | this |
| 3110 | Minanibai | wotoiya | | | Franklin (1973) | |
| 144769 | Moere | awa | | | Z'graggen (1980) | this |
| 29613 | Molof | nijena | | | Voorhoeve (1971) | |
| 6150 | Moni (Kemandoga Dialect) | ka | | | Larson & Larson (1972) | |
| 6151 | Moni (Kemandoga Dialect) | kogi | | | Larson & Larson (1972) | |
| 193930 | Moresada | inə | | | Z'graggen (1980) | this |
| 3529 | Morigi | nolo | | | Wurm (1973) | |
| 125979 | Mosimo | amɛ | | | Z'graggen (1980) | this |
| 15527 | Mountain Koiari | ko | this | | Dutton (2010) | |
| 34253 | Mubami | wobo | | | Reesink (1976) | |
| 34252 | Mubami | ɛti | | | Reesink (1976) | |
| 3427 | Mubami | ape wovavo | | | Franklin (1973) | |
| 193925 | Mum | numa | | | Z'graggen (1980) | this |
| 198675 | Mungkip | jaŋ | | | Retsema et al. (2009) | |
| 125963 | Munit | ɛnɛ | | | Z'graggen (1980) | this |
| 125976 | Murupi | ta | | | Z'graggen (1980) | this |
