| yby | yawe1241 | Yaweyuha | T,
K,
G,
Siane | 377 |
| ydk | yoid1240 | Yoidik | T,
M,
C,
Hanseman | 351 |
| yee | yima1243 | Yimas | R,
L,
Karawari | 251 |
| yet | yetf1238 | Yetfa | Unclassified | 111 |
| ygr | huaa1250 | Yagaria (Hua Dialect) | T,
K,
G,
Kamano-Yagaria | 92 |
| ygr | hira1246 | Yagaria (Hira Dialect) | T,
K,
G,
Kamano-Yagaria | 283 |
| ygr | yaga1260 | Yagaria | T,
K,
G,
Kamano-Yagaria | 229 |
| ygw | yagw1240 | Yagwoia | T,
A,
Nuclear Angan | 101 |
| yis | yiss1240 | Yis | T,
W,
Wapei | 45 |
| yki | yoke1238 | Yoke | Lower Mamberamo | 23 |
| ykr | yeko1240 | Yekora | T,
G,
B,
Yekora | 218 |
| yli | angg1239 | Yali, Angguruk | T,
W,
D,
Ngalik | 111 |
| yll | yill1241 | Yil | T,
W,
Wapei | 46 |
| ymo | yang1296 | Yangum Mon | T,
W,
Palei | 46 |
| ynl | yang1298 | Yangulam | T,
M,
R,
Nuru | 290 |
| yon | yong1280 | Yongkom | T,
O,
O,
Lowland | 55 |
| yrw | yara1250 | Yarawata | T,
M,
C,
P,
Numugenan | 362 |
| yss | yess1239 | Yessan-Mayo (Warasai Dialect) | S,
Tama | 30 |
| yss | yess1239 | Yessan-Mayo | S,
Tama | 88 |
| yut | noko1240 | Yopno (Nokopo Dialect) | T,
F,
F,
Yupna | 55 |
| yut | kewi1240 | Yopno (Kewieng Dialect) | T,
F,
F,
Yupna | 59 |
| yuw | yaum1237 | Yau (Yawan Dialect) | T,
F,
F,
Uruwa | 51 |
| yuw | yaum1237 | Yau (Sindamon Dialect) | T,
F,
F,
Uruwa | 52 |
| yuw | yaum1237 | Yau (mup Dialect) | T,
F,
F,
Uruwa | 54 |
| yuw | yaum1237 | Yau (Mitmit Dialect) | T,
F,
F,
Uruwa | 52 |
| yuw | yaum1237 | Yau (Kumdauron Dialect) | T,
F,
F,
Uruwa | 54 |
| yuw | yaum1237 | Yau (Worin Dialect) | T,
F,
F,
Uruwa | 55 |
| yva | nucl1454 | Yawa | W,
Yapen | 40 |
| yyu | yaus1235 | Yau | T,
W,
Wapei | 46 |
| zia | mawa1265 | Zia (Mawai Dialect) | T,
G,
B,
North Binanderean | 173 |
| zia | ziaa1250 | Zia | T,
G,
B,
North Binanderean | 310 |
| zik | zima1244 | Zimakani (South Boazi Dialect) | T,
M,
Boazi | 213 |
| zik | bagw1238 | Zimakani (Begua Dialect) | T,
M,
Boazi | 184 |
| zik | zima1244 | Zimakani | T,
M,
Boazi | 271 |
| zrs | nucl1594 | Mairasi | Mairasic | 40 |
| zuh | toka1244 | Tokano | T,
K,
G,
Gahuku-Benabena | 160 |
| kasu1243 | Kokoda (Kasueri Dialect) | S,
East South Bird's Head | 144 |
| bara1347 | Kemberamo (Barau Dialect) | S,
East South Bird's Head | 6 |
| sout1516 | Proto-South Bird's Head | South Bird's Head | 81 |
| yamb1257 | Yamben | T,
M,
Croisilles | 20 |
| mans1260 | Mansim | Hatam-Mansim | 12 |
| | Unknown (possibly Konomala) | | 138 |
| wagg1235 | Proto-Ottilien | R,
R,
Ottilien | 51 |
| taro1259 | Kokoda (Tarof Dialect) | S,
East South Bird's Head | 6 |
| domb1240 | Arandai (Dombano Dialect) | S,
East South Bird's Head | 99 |
| negr1235 | Kokoda (Negeri Besar Dialect) | S,
East South Bird's Head | 5 |
| | Proto-Central-Sogeram | T,
M,
S,
+,
Central | 102 |
| ambe1246 | Ambermo | Unclassifiable | 2 |
| kemb1235 | Kemberamo (Kalitami Dialect) | S,
East South Bird's Head | 121 |
| lowe1437 | Proto-Lower-Sepik | R,
Lower Sepik | 134 |
