| Ypsolopha sasayamana | Ypsolopha sasayamanus | Ypsolopha satellitella |
| Ypsolopha scabrella | Ypsolopha scenites | Ypsolopha schwarziella |
| Ypsolopha sculpturella | Ypsolopha semitessella | Ypsolopha senex |
| Ypsolopha seniculella | Ypsolopha sequella | Ypsolopha sordida |
| Ypsolopha striatella | Ypsolopha strigosus | Ypsolopha sublucella |
| Ypsolopha sylvella | Ypsolopha tesselatidorsata | Ypsolopha trichonella |
| Ypsolopha tsugae | Ypsolopha ulingensis | Ypsolopha undulatella |
| Ypsolopha unicipunctella | Ypsolopha uniformis | Ypsolopha ustella |
| Ypsolopha vintrella | Ypsolopha vittella | Ypsolopha walsinghamiella |
| Ypsolopha yangi | Ypsolopha yasudai | Ypsora |
| Ypsora lepraota | Ypsora santaris | Ypsora selenodes |
| Ypsora violascens | Ypypuera | Ypypuera crucifera |
| Ypypuera esquisita | Ypypuera vittata | Yquebeuf |
| Yquelon | Yrias | Yronde-et-Buron |
| Yrouerre | Ys Origin | Yspertal |
| YSR Kadapa | Yssac-la-Tourette | Yssandon |
| Yssichromis argens | Yssichromis pyrrhocephalus | Yssichromis sp. nov. 'argens' |
| Yssingeaux | Yssingeaux (huyện) | Yssingeaux (quận) |
| Ystad (đô thị) | Ytrac | Ytres |
| Yttecbi | Ytterbi | Ytterbi(III) clorua |
| Ytterbium | Ytterby | Yttri |
| Yttri(III) oxit | Yu (hangul) | Yu (họ người Triều Tiên) |
| Yu In-soo | Yu Jae-seok | Yu Kil-chun |
| Yu Sang-hun | Yu Seung-ho | Yu Tamura (cầu thủ bóng đá) |
| Yu Wenxia | Yu Yangyi | Yu Yasukawa |
| Yu Yeon-jung | Yu Yu Hakusho | Yu-Gi-Oh |
| Yu-Gi-Oh! | Yu-Gi-Oh! (phim 1999) | Yu-Gi-Oh! 5D's |
| Yu-Gi-Oh! Arc-V | Yu-Gi-Oh! GX | Yu-Gi-Oh! The Movie Soundtrack |
| Yu-Gi-Oh! VRAINS | Yu-Gi-Oh! Zexal | Yu-na Kim |
| Yu-Na Kim | Yua austro-orientalis | Yua thomsonii |
| Yuan | Yuan T. Lee | Yuan Trung Quốc |
| Yuanmousaurus | Yuanshi | Yuđa |
| Yuba City, California | Yuba, Wisconsin | Yubasaurus |
| Yubileynyy (huyện) | YuBin | Yucatalana robustispina |
| Yucatan | Yucatán | Yucatán (bang) |
| Yucca | Yucca aloifolia | Yucca aloifolia aloifolia |
| Yucca aloifolia var. aloifolia | Yucca angustissima | Yucca angustissima avia |
| Yucca angustissima kanabensis | Yucca angustissima toftiae | Yucca angustissima var. avia |
| Yucca angustissima var. kanabensis | Yucca angustissima var. toftiae | Yucca arkansana |
| Yucca × schottii | Yucca baccata | Yucca baccata baccata |
| Yucca baccata brevifolia | Yucca baccata var. baccata | Yucca baccata var. brevifolia |
| Yucca baileyi | Yucca brevifolia | Yucca campestris |
| Yucca capensis | Yucca carnerosana | Yucca cernua |
| Yucca coahuilensis | Yucca constricta | Yucca de-smetiana |
| Yucca decipiens | Yucca declinata | Yucca elata |
| Yucca elata elata | Yucca elata var. elata | Yucca elata var. verdiensis |
| Yucca elata verdiensis | Yucca elephantipes | Yucca endlichiana |
| Yucca faxoniana | Yucca filamentosa | Yucca filifera |
| Yucca flaccida | Yucca gigantea | Yucca glauca |
| Yucca gloriosa | Yucca gloriosa gloriosa | Yucca gloriosa recurvifolia |
| Yucca gloriosa var. gloriosa | Yucca gloriosa var. recurvifolia | Yucca grandiflora |
| Yucca harrimaniae | Yucca intermedia | Yucca jaliscensis |
| Yucca lacandonica | Yucca linearifolia | Yucca madrensis |
| Yucca mixtecana | Yucca necopina | Yucca neomexicana |
| Yucca pallida | Yucca periculosa | Yucca potosina |
| Yucca queretaroensis | Yucca reverchonii | Yucca rigida |
| Yucca rostrata | Yucca rupicola | Yucca schidigera |
| Yucca schottii | Yucca tenuistyla | Yucca thompsoniana |
| Yucca treculeana | Yucca utahensis | Yucca valida |
| Yuchun | Yuck (album) | Yuck (ban nhạc) |
| Yudachi (khu trục hạm Nhật) | Yudachi (tàu khu trục Nhật) | Yudai Inoue |
| Yudai Iwama | Yudai Konishi | Yudan, Yozgat |
| Yudoma | Yue liang dai biao wo de xin | Yuehua Entertainment |
| Yuen Wah | Yueosaurus | Yufu, Ōita |
| Yugi Muto | Yugi Mutou | Yugi Oh |
| Yugi Oh! | Yugorsk | Yugoslavia |
| Yugovostochniy (huyện) | Yugozapadniy (huyện) | Yuguchi Eizo |
| Yugure (khu trục hạm Nhật) | Yugure (tàu khu trục Nhật) | Yuh Woon-Hyung |
| Yuhbae | Yuhei Sato (cầu thủ bóng đá) | Yuhi Mitsue |
| Yuhina | Yuhina bakeri | Yuhina brunneiceps |
| Yuhina castaniceps | Yuhina castaniceps castaniceps | Yuhina castaniceps plumbeiceps |
| Yuhina castaniceps rufigenis | Yuhina castaniceps striata | Yuhina diademata |
| Yuhina everetti | Yuhina flavicollis | Yuhina flavicollis albicollis |
| Yuhina flavicollis clarki | Yuhina flavicollis constantiae | Yuhina flavicollis flavicollis |
| Yuhina flavicollis rogersi | Yuhina flavicollis rouxi | Yuhina gularis |
| Yuhina gularis gularis | Yuhina gularis omiensis | Yuhina gularis uthaii |
| Yuhina gularis vivax | Yuhina humilis | Yuhina nigrimenta |
| Yuhina nigrimenta intermedia | Yuhina nigrimenta nigrimenta | Yuhina nigrimenta pallida |
| Yuhina occipitalis | Yuhina occipitalis obscurior | Yuhina occipitalis occipitalis |
| Yuhina torqueola | Yuhina zantholeuca | Yuhki Kuramoto |
| Yuhwa | Yui | Yui Aragaki |
| Yui Hatano | Yui Horie | Yuichi Ito |
| Yuichi Komano | Yuichi Nishimura | Yuichi Suzumoto |
| Yuji Hoshi | Yuji Kajikawa | Yuji Kimura |
| Yuji Nakazawa | Yuji Sakuda | Yuji Senuma |
| Yuji Unozawa | Yuji Yabu | Yuju (ca sĩ) |
| Yuka Hirata | Yuka Kinoshita | Yukamensky (huyện) |
| Yukarı Akın, Karaman | Yukarı Aktepe, Beydağ | Yukarı Şahinler, Arhavi |
| Yukarı İkizören, Araç | Yukarı Örenseki, İskilip | Yukarı Çağlar, Ermenek |
| Yukarı Çamurdere, Çayırlı | Yukarı Çapak, Çivril | Yukarı Çiftlikli, Kaman |
| Yukarı Damlapınar, Selim | Yukarı Emirhalil, Bayat | Yukarı Fındıklı, İspir |
| Yukarı Gökdere, Eğirdir | Yukarı Görle, Karacasu | Yukarı Hacıbey, Varto |
| Yukarı Homurlu, Kırşehir | Yukarı Karacasu, Olur | Yukarı Karavaiz, Araban |
| Yukarı Karpuzlu, Ergani | Yukarı Kartallı, Çayırlı | Yukarı Kıratlı, Kozluk |
| Yukarı Kırlı, Yeşilova | Yukarı Kızılca, Karaman | Yukarı Kızılcaören, Karabük |
| Yukarı Körücek, Mecitözü | Yukarı Kepirce, Arsuz | Yukarı Kotanlı, Selim |
| Yukarı Kuyucak, Ortaköy | Yukarı Tırtar, Yalvaç | Yukarı Tosunlar, Beydağ |
| Yukarı Yufkalı, Araban | Yukarıağadeve, Hamur | Yukarıada, Bergama |
| Yukarıada, Ulaş | Yukarıakçagedik, Erciş | Yukarıakın, Karaman |
| Yukarıakören, Şanlıurfa | Yukarıakören, Suşehri | Yukarıakdibek, Bağlar |
