| yyu | yaus1235 | Yau | T,
W,
Wapei | 46 |
| yby | yawe1241 | Yaweyuha | T,
K,
G,
Siane | 377 |
| ybx | yawi1238 | Yawiyo (Wosawari Dialect) | S,
L,
Walio | 96 |
| nou | yega1243 | Ewage-Notu (Yega Dialect) | T,
G,
B,
N,
S,
C,
Notu | 0 |
| jei | yeii1239 | Yei | S,
M,
Yey | 41 |
| ykr | yeko1240 | Yekora | T,
G,
B,
Yekora | 218 |
| jel | yelm1242 | Yelmek | S,
Yelmek-Maklew | 42 |
| gop | yere1243 | Yeretuar | A,
M,
C,
E,
S,
W,
C,
Yeretuar | 7 |
| yss | yess1239 | Yessan-Mayo (Warasai Dialect) | S,
Tama | 30 |
| yss | yess1239 | Yessan-Mayo | S,
Tama | 88 |
| yet | yetf1238 | Yetfa | Unclassified | 111 |
| yll | yill1241 | Yil | T,
W,
Wapei | 46 |
| yee | yima1243 | Yimas | R,
L,
Karawari | 251 |
| yis | yiss1240 | Yis | T,
W,
Wapei | 45 |
| ydk | yoid1240 | Yoidik | T,
M,
C,
Hanseman | 351 |
| yki | yoke1238 | Yoke | Lower Mamberamo | 23 |
| yon | yong1280 | Yongkom | T,
O,
O,
Lowland | 55 |
| gdr | yuta1239 | Wipi (Yuta Dialect) | Eastern Trans-Fly | 73 |
| zia | ziaa1250 | Zia | T,
G,
B,
North Binanderean | 310 |
| ziaa1250 | Proto-Zia-Mawae | T,
G,
B,
North Binanderean | 0 |
| zik | zima1244 | Zimakani | T,
M,
Boazi | 269 |
| zik | zima1244 | Zimakani (South Boazi Dialect) | T,
M,
Boazi | 213 |
| | Proto-Isumrud | T,
M,
C,
Isumrud | 17 |
| | Unknown (possibly Konomala) | | 138 |
| | Magɨ | T,
M,
S,
W,
Emuan | 85 |
| | Proto-Eleman-Koriki | T,
Eleman | 20 |
| | Proto-Sub-Rai | T,
M,
Rai Coast | 8 |
| | Proto-North-Adelbert | T,
M,
Croisilles | 486 |
| | Proto-Pihom | T,
M,
C,
Pihom | 42 |
