Definities van Katholieke Encyclopaedie in de Ensie Y
- Y
- Y-chromosoom
- Y.M.C.A
- Yaganes
- Yakima-Indianen
- Yale University
- Yanam
- Yankee
- Yankee-Doodle
- Yankton-Sioux-Indianen
- Yard
- Yarmouth
- Yarmouthien
- Yasjts
- Yatreen
- Yavapai-Indianen
- Yawata
- Yawltuig
- Yaws
- Yeats
- Yeeste
- Yellow-Knives-Indianen
- Yellowstone Park
- Yellowstone River
- Yelves
- Yemantssoen
- Yerkes
- Yerkes-sterrenwacht
- Yernée-Fraineux
- Yerseke
- Yersekendam
- Yewe
- Ymir
- Yntema, Jacob Wybrand
- Yoakim
- Yoghurt
- Yohimbine
- Yoldiatijd
- Yoldiazee
- Yonge, Charlotte
- Yonkers
- Yonne
- Yoors
- York (genealogie)
- York (geografie)
- York Antwerp Rules
- York Moors
- York von Wartenburg, Johann David Ludewig, graaf
- York Wolds
- York, Th. van
- Yorke
- Yorkshire
- Yorkshire-varken
- Yorktown
- Yosemite Valley
- Young
- Young Men’s Christian-Association (Y. M.C.A.)
- Young-plan
- Ypelaer, Den
- Yperiet
- Yperman, Jan
- Ypre jeghen Poperinghe
- Yprésien
- Ypsilanti, Alexander
- Yrinus
- Yriö-Koskinen, Freiherr
- Ysabie, Reinier
- Ysaye
- Ysenbrandt, Adriaan
- Ysendyck, Jules Jacques van
- Ysermans, Joan
- Ysopet
- Ytterbium, Yttrium
- Yucatan
- Yucca
- Yuchi-Indianen
- Yukon
- Yukonterritorium
- Yuma-Indianen
- Yurok-Indianen
- Yussuff
- Yuste
- Yver
- Yves de Ia Brière
- Yves Joseph de Kerguelen-Tremarec
- Yves-Gomezée
- Yvoir