- Tzadikim Nistarim
- Tzitzimime
- Tzitzimitl
- UNIVERSAL MONSTERS
- U`tlûñ'ta
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- Uburd
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- Ucumar
- Ufiti
- Ujit
- Ukobach
- Umdhlebi
- Umibozu
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- Undine
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- Uraeus
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- Urban legend
- Urisk
- Uroboros
- Uruisg
- Uruk-hai
- Ushi-oni
- Ustrel
- Utukki
- Utukku
- Uvall
- Uwan
- Vahagn
- Vajrakilaya
- Valefor
- Valkyrie
- Vampijerovic
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- Vampire Behavior
- Vampire Cat of Nabeshima
- Vampire cat
- Vampire hunter
- Vampire number
- Vampire pumpkin
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- Vampiric
- Vampyr
- Vanara
- Vanishing hitchhiker
- Vapula
- Varan
- Varcolac
- Vardøger
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- Varuna
- Vasitri
- Vassago
- Vegetable lamb
- Velns
- Veo
- Vepar
- Verbti
- Verin
- Vermilion Bird
- Verrine
- Vetala
- Vetter
- Vidyadhara
- Vietnamese dragon
- Vikoka
- Vila
- Vilce
- Vilkacis
- Vine
- Violet and Daisy Hilton
- Virochana
- Vision Serpent
- Vjestitza
- Vlad Tepes
- Vlad the impaler
- Vodianoi
- Vodník
- Vodyanoy
- Volac
- Voodoo
- Vortex
- Vouivre
- Vritra
- Vrykolakas
- Vual
- Väki
- Vættir
- Waitoreke
- Wak-Wak
- Wak-wak
- Wak Wak
- Wakwak
- Wampus cat
- Wandering Jew
- Wani
- Wanyudo
- Warcraft
- Warhammer
- Warlock
- Water Leaper
- Water Tiger
- Waveney Monster
- Wayob
- Weaknesses of the Vampire
- Wekufe
- Wendigo
- Wentshukumishiteu
- Wer-wolf
- Were-Owl of China
- Werecat
- Werehyena
- Werewolf
- Wesakechak
- What Monstropedia is not
- What is Monstropedia ?
- White Dragon
- White Lady
- White Lady of Easton
- White River Monster
- White Tiger (Chinese constellation)
- White Woman
- White lady
- Whowie
- Wicca
- Wichtlan
- Wichtlein
- Wight
- Wiindigoo
- Wila
- Wild Hunt
- Wild Man of the Navidad
- Wild haggis
- Wild man
- Wili
- Will O'The Wisp
- Will o' the wisp
- William MacDonald
- Willy-willy
- Windigo
- Wip
- Wirry-cow
- Wisht hounds
- Witch
- Witch Queen of Perrenland
- Witch of Endor
- Witch stone
- Witchcraft
- Witte Wieven
- Wizard
- Wodjanoj
- Wolpertinger
- Women in White
- Wood-Wife
- Wood Wife
- Wood devil
- Woodwose
- Wraith
- Wulver
- Wyvern
- Xana
- Xaphan
- Xiezhi
- Xindhi
- Xing Tian
- Xiuhcoatl
- Xolotl
- Y Ddraig Goch
- Yacumama
- Yahoo
- Yaksha
- Yakshini
- Yale
- Yali
- Yama-bito
- Yama-uba
- Yama-waro
- Yambe-Akka
- Yamm
- Yan-gant-y-tan
- Yanluo Wang
- Yaoguai
- Yara-ma-yha-who
- Yasha
- Yatagarasu
- Yato-no-kami
- Yazidi
- Ye-cha
- Yecha
- Yeenaaldlooshii
- Yehasuri
- Yellow Dragon of the Center
- Yenaldlooshi
- Yeren
- Yeti
- Yggdrasill
- Yinepu
- Ying-lung
- Yinglong
- Yinlugen Bud
- Yofune-nushi
- Yog-Sothoth
- Yokai
- Yomotsu-shikome
- Yowie
- Ypotryll
- Yu-Gi-Oh
- Yucca Man
- Yuki-onna
- Yule Cat
- Yule Lad
- Yumbo
- Yunwi Djunsti
- Yunwi Tsunsdi
- Yurei
- Yvette and Yvonne McCarther
- Yōkai
- Yūrei
- Zagan
- Zahhak
- Zalambur
- Zampolve
- Zana
- Zana e malit
- Zashiki-warashi
- Zburator
- Zegben
- Zeme
- Zennyo Ryūō
- Zepar
- Zeta
- Zeta Reticulian
- Zeus
- Zhar-ptitsa
- Zhenniao
- Zhong Kui
- Zhu Bajie
- Zhu Rong
- Zhulong
- Zhuyin
- Zig
- Zilant
- Zirnitra
- Ziz
- Zmajeviti
- Zmej
- Zmeu
- Zodiac Killer
- Zombie
- Zombies
- Zoosadism
- Zu
- Zuiyo Maru
- Zână
- Á Bao A Qu
- Ãlfheim
- Émile Louis
- Ægir
- Ördög
- Ōkubi
- Šulak
- Žaltys
- Žemyna
- Daidara-bocchi
- Sazae-oni