| Cyfer | Cyffordd Dyfi | Cyffordd Llandudno |
| Cyffordd Twnnel Hafren | Cyffylliog | CYFH |
| CYFH (disambiguation) | CYFI | CYFIP1 |
| CYFIP1 (gene) | CYFIP2 | CYFIP2 (gene) |
| CYFJ | Cyfluthrin | Cyfnerth Redaction |
| CYFO | Cyfoesi Myrddin a Gwenddydd ei Chwaer | Cyfos |
| CYFR | Cyfra Plus | CYFRA+ |
| Cyfra+ | Cyfraith Hywel | Cyfranc Lludd a Llefelys |
| Cyfri'r Geifr | Cyfri'r Giefr | Cyfrifoldeb Awdurdod S4C |
| Cyfrinach y Bedyddwyr | Cyfronydd | Cyfronydd Hall |
| Cyfronydd railway station | Cyfrowy Polsat | Cyfrowy Polsat 2 |
| Cyfrwy | CYFS | CYFS (disambiguation) |
| CYFS Watch | CYFT | CYFtLT |
| Cyfyngedig | Cyfyw | Cyg |
| CYG | CYG (disambiguation) | Cyg A |
| Cyg OB2 -8A | Cyg OB2-12 | Cyg X-1 |
| Cyg X-3 | CYG2 | Cygames |
| Cygames Osaka | Cygames Pictures | Cygames, Inc. |
| CygamesPictures | CygamesPictures, Inc. | Cygan |
| Cygan, Łódź Voivodeship | Cygan, James | Cygan, John |
| Cygan, Lodz Voivodeship | Cyganówka | Cyganówka, Garwolin County |
| Cyganówka, Zwoleń County | Cyganek | Cyganka |
| Cyganka (disambiguation) | Cyganka, Żyrardów County | Cyganka, Lublin Voivodeship |
| Cyganka, Masovian Voivodeship | Cyganka, Pomeranian Voivodeship | Cyganka, Silesian Voivodeship |
| Cyganka, Zyrardow County | Cyganki | Cyganowka |
| Cyganowka, Garwolin County | Cyganowka, Zwolen County | Cygany |
| Cygany (disambiguation) | Cygany, Łódź Voivodeship | Cygany, Lodz Voivodeship |
| Cygany, Masovian Voivodeship | Cygany, Podkarpackie Voivodeship | Cygany, Pomeranian Voivodeship |
| Cygany, Subcarpathian Voivodeship | Cygaritis aranda | Cygaritis taikosama |
| Cygów | CYGB | CYGB (disambiguation) |
| CYGB (gene) | CYGD | Cygdrive |
| CYGE | CYGH | CYGK |
| CYGL | CYGM | CYGM filter |
| Cygnaeus Gallery | Cygnal | Cygnar |
| Cygne | Cygne (disambiguation) | Cygne blanc |
| Cygne noir | Cygnes | Cygnes (disambiguation) |
| Cygnet | Cygnet "The Port" | Cygnet (Aston Martin) |
| Cygnet (barque) | Cygnet (bird) | Cygnet (disambiguation) |
| Cygnet (ship) | Cygnet 44 | Cygnet Cinema |
| Cygnet Committee | Cygnet Estuary Conservation Park | Cygnet Folk Festival |
| Cygnet Football Club | Cygnet Health Care | Cygnet Healthcare |
| Cygnet Island | Cygnet islands | Cygnet River |
| Cygnet River, South Australia | Cygnet Rowing Club | Cygnet Shop |
| Cygnet Shops | Cygnet Theatre | Cygnet Theatre (Edinburgh) |
| Cygnet Theatre Company | Cygnet Theatre Edinburgh | Cygnet Theatre, Edinburgh |
| Cygnet, Alberta | Cygnet, OH | Cygnet, Ohio |
| Cygnet, Tasmania | Cygnets | Cygnific B.V. |
| Cygninae | Cygnini | Cygnis insignis |
| Cygnix | Cygnodraco | Cygnodraco mawsoni |
| Cygnonathus | Cygnopsis cygnoides | Cygnosic |
| CYGNOSIC | CYGNSS | Cygnus |
| Cygnus (bird) | Cygnus (Chinese astronomy) | Cygnus (constellation) |
| Cygnus (disambiguation) | Cygnus (equivalents in Chinese astronomy) | Cygnus (genus) |
| Cygnus (mythology) | Cygnus (spacecraft) | Cygnus (swan) |
| Cygnus (Traditional Chinese star name) | Cygnus 1 | Cygnus 2 |
| Cygnus 20 | Cygnus 3 | Cygnus A |
| Cygnus Air | Cygnus Arm | Cygnus atratus |
| Cygnus bewickii | Cygnus Bubble | Cygnus buccinator |
| Cygnus Business Media | Cygnus business media | Cygnus capsule |
| Cygnus columbianus | Cygnus columbianus bewickii | Cygnus columbianus jancowskii |
| Cygnus columbianus jankowskii | Cygnus constellation | Cygnus CRS NG-10 |
| Cygnus CRS OA-10E | Cygnus CRS OA-11 | Cygnus CRS OA-11E |
| Cygnus CRS OA-4 | Cygnus CRS OA-5 | Cygnus CRS OA-6 |
| Cygnus CRS OA-7 | Cygnus CRS OA-8E | Cygnus CRS OA-9E |
| Cygnus CRS Orb-1 | Cygnus CRS Orb-10E | Cygnus CRS Orb-2 |
| Cygnus CRS Orb-3 | Cygnus CRS Orb-4 | Cygnus CRS Orb-5 |
| Cygnus CRS Orb-6 | Cygnus CRS Orb-7 | Cygnus CRS Orb-8E |
| Cygnus CRS Orb-9E | Cygnus CRS-15 | Cygnus cucullatus |
| Cygnus cygnus | Cygnus equitum | Cygnus falconeri |
| Cygnus ferus | Cygnus gas field | Cygnus Home Service |
| Cygnus Hyōga | Cygnus Hyōga (character) | Cygnus Hyoga |
| Cygnus in Chinese astronomy | Cygnus Inc | Cygnus Katherine Johnson |
| Cygnus Loop | Cygnus loop | Cygnus Mass Simulator |
| Cygnus matthewi | Cygnus melancorypha | Cygnus melancoryphus |
| Cygnus melanocorypha | Cygnus melanocoryphus | Cygnus molecular cloud complex |
| Cygnus NG-10 | Cygnus NG-10E | Cygnus NG-11 |
| Cygnus NG-12 | Cygnus NG-13 | Cygnus NG-14 |
| Cygnus NG-15 | Cygnus NG-16 | Cygnus NG-17 |
| Cygnus NG-18 | Cygnus NG-19 | Cygnus NG-20 |
| Cygnus NG-21 | Cygnus NG-22 | Cygnus OA-15 |
| Cygnus OA-4 | Cygnus OA-5 | Cygnus OA-6 |
| Cygnus OA-7 | Cygnus OA-8E | Cygnus OA-9E |
| Cygnus OB2 | Cygnus OB2 12 | Cygnus OB2 No. 12 |
| Cygnus OB2-12 | Cygnus OB2-8A | Cygnus OB7 |
| Cygnus OB9 | Cygnus olor | Cygnus Orb-1 |
| Cygnus ORB-15 | Cygnus Orb-15 | Cygnus Orb-2 |
| Cygnus Orb-3 | Cygnus Orb-D1 | Cygnus OSC-15 |
| Cygnus paloregonus | Cygnus Rift | Cygnus Solutions |
| Cygnus spacecraft | Cygnus Star Cloud | Cygnus Studios |
| Cygnus sumnerensis | Cygnus Support | Cygnus vismund cygnus |
| Cygnus X | Cygnus X (disambiguation) | Cygnus X (music group) |
| Cygnus X (star complex) | Cygnus X-1 | Cygnus X-1 (disambiguation) |
| Cygnus X-1 (EP) | Cygnus X-1 (extended play) | Cygnus X-1 (song series) |
| Cygnus X-1 (song) | Cygnus X-1 Book I | Cygnus X-1 Book I: The Voyage |
| Cygnus X-1 Book II | Cygnus X-1 Book II: Hemispheres | Cygnus X-1 duology |
| Cygnus X-1 Series | Cygnus X-1 series | Cygnus X-1 Series (song) |
| Cygnus X-3 | Cygnus x-3 | Cygnus X1 |
| Cygnus-X | Cygnus-X (star complex) | Cygnus....Vismund Cygnus |
| CygnusEd | CYGO | CYGO (rapper) |
| Cygow | CYGP | Cygpath |
