| 20459 | Manikion | huay | | | Voorhoeve (1975) | |
| 261009 | Mansim | jan | | | Fabritius (1855) | 2 |
| 90566 | Mape | yoyokak | two | | McElhanon (1967) | two |
| 236693 | Marangis | mbwoini | | | Foley (2005) | |
| 24879 | Marau | ko-iru | | | Voorhoeve (1975) | |
| 22339 | Marind | inah | | | Voorhoeve (1975) | |
| 21938 | Marind, Bian | inah | | | Voorhoeve (1975) | |
| 125043 | Matepi | werar | | | Z'graggen (1980) | two |
| 143906 | Mauwake | ɛrup | | | Z'graggen (1980) | (two) |
| 143910 | Mawak | irɛb | | | Z'graggen (1980) | (two) |
| 125041 | Mawan | kwara:ra | | | Z'graggen (1980) | two |
| 25767 | Mawes | yakenew | | | Voorhoeve (1975) | |
| 260804 | Ma'ya | roe | | | Fabritius (1855) | 2 |
| 24211 | Ma'ya | lu | | | Voorhoeve (1975) | |
| 77827 | Maybrat | ewok | | | Dol (2007) | |
| 77826 | Maybrat | eok | | | Dol (2007) | |
| 77035 | Mbaniata | ēri | | | Tryon & Hackman (1983) | |
| 76727 | Mbaniata (Lokuru Dialect) | ēri | | | Tryon & Hackman (1983) | |
| 76458 | Mbilua | ɔmuŋga | two | | Tryon & Hackman (1983) | |
| 76265 | Mbilua (Ndovele Dialect) | omuŋga | two | | Tryon & Hackman (1983) | |
| 236692 | Mbore | mbuniŋ | | | Foley (2005) | |
| 244637 | Mehek | lisifu | | | Laycock (1968) | |
| 25887 | Mekwei | naman | | | Voorhoeve (1975) | |
| 316 | Mena | haiɛ | | | Franklin (1973) | |
| 244646 | Mende | frišip | | | Laycock (1968) | |
| 4844 | Menya | hɨnqwaaqwo | | | Lloyd (1973) | |
| 90560 | Mesem | dzeba | two | | McElhanon (1967) | two |
| 34363 | Meyah (Akrin Dialect) | ègeka | | | Miedema & Welling (1985) | |
| 34403 | Meyah (Anason Dialect) | èrfik | | | Miedema & Welling (1985) | |
| 34524 | Meyah (Etskebi Dialect) | argak | | | Miedema & Welling (1985) | |
| 34564 | Meyah (Miun Dialect) | afik | | | Miedema & Welling (1985) | |
| 34605 | Meyah (Mumbrani Dialect) | èrgèk | | | Miedema & Welling (1985) | |
| 20379 | Meyah | ergek | | | Voorhoeve (1975) | |
| 143905 | Miani | ner | | | Z'graggen (1980) | (two) |
| 218265 | Migabac | jaeckaŋ | | | SIL (1975) | |
| 180944 | Migum | aliki | | | Z'graggen (1980) | two |
| 3113 | Minanibai | masi | | | Franklin (1973) | |
| 244626 | Minidien | yatowiye | | | Laycock (1968) | |
| 25967 | Mlap | namoŋ | | | Voorhoeve (1975) | |
| 143908 | Moere | ɛrkiɛ | | | Z'graggen (1980) | (two) |
| 260852 | Moi | ali | | | Fabritius (1855) | 2 |
| 20138 | Moi | ali | | | Voorhoeve (1975) | |
| 29618 | Molof | ateti | | | Voorhoeve (1971) | |
| 19653 | Molof | ateti | | | Voorhoeve (1975) | |
| 21143 | Mombum | kumb | | | Voorhoeve (1975) | |
| 22379 | Moni | hiya | | | Voorhoeve (1975) | |
| 6153 | Moni (Kemandoga Dialect) | hija | | | Larson & Larson (1972) | |
| 21818 | Mor | kin | | | Voorhoeve (1975) | |
| 20179 | Moraid | telok | | | Voorhoeve (1975) | |
| 25201 | Mor (Austronesian) | ruru | | | Voorhoeve (1975) | |
