| yva | nucl1454 | Yawa | W,
Yapen | 40 |
| yby | yawe1241 | Yaweyuha | T,
K,
G,
Siane | 377 |
| ybx | yawi1238 | Yawiyo (Wosawari Dialect) | S,
L,
Walio | 96 |
| kpr | kora1294 | Yegha (Oukena Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 83 |
| kpr | kora1294 | Yegha (Ambe-Dofo Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 50 |
| kpr | kora1294 | Yegha (Yega Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 130 |
| kpr | kora1294 | Yegha (Korafe Dialect) | T,
G,
B,
N,
S,
C,
Gaena-Korafe | 520 |
| jei | yeii1239 | Yei | S,
M,
Yey | 41 |
| ykr | yeko1240 | Yekora | T,
G,
B,
Yekora | 218 |
| jel | yelm1242 | Yelmek | S,
Yelmek-Maklew | 42 |
| ire | ires1239 | Yeresiam | A,
M,
C,
E,
S,
W,
C,
Iresim | 4 |
| 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 |
| yut | noko1240 | Yopno (Nokopo Dialect) | T,
F,
F,
Yupna | 55 |
| yut | kewi1240 | Yopno (Kewieng Dialect) | T,
F,
F,
Yupna | 59 |
| zia | ziaa1250 | Zia | T,
G,
B,
North Binanderean | 310 |
| zia | mawa1265 | Zia (Mawai Dialect) | T,
G,
B,
North Binanderean | 173 |
| zik | zima1244 | Zimakani (South Boazi Dialect) | T,
M,
Boazi | 213 |
| zik | zima1244 | Zimakani | T,
M,
Boazi | 269 |
| zik | bagw1238 | Zimakani (Begua Dialect) | T,
M,
Boazi | 184 |
| wfg | yafi1240 | Zorop | P,
Eastern | 150 |
