This list includes 13 Mythological creatures that start with U, from “Ugallu” to “Uwan”. It gathers non-human beings—monsters, spirits, and legendary animals—useful for research, writing, teaching, game design, and general curiosity.
Mythological creatures are non-human beings from myth and folklore, including spirits, monsters, and hybrid animals. Many cultures used these beings to explain natural forces; for example, Ugallu appears in Mesopotamian protective texts.
Below you’ll find the table with Origin, Description, and Famous stories.
Origin: Shows the culture or region where each creature appears, so you can trace geographic and cultural context for your research.
Description: Gives a concise summary of the creature’s appearance, powers, and typical behavior, helping you judge its narrative or research value.
Famous stories: Lists one or two named myths or works where the creature features, so you can find primary examples quickly.
Mythological creatures that start with U
Name
Origin
Alternate names/spellings
Famous stories
Unicorn
European
Monoceros
Pliny the Elder’s *Natural History*; medieval bestiaries
Undine
European Alchemy
Ondine
Paracelsus’s writings; *Ondine* by Friedrich de la Motte Fouqué
Ushi-oni
Japanese
Gyūki
*Ehon Hyaku Monogatari*; regional legends in western Japan
Uktena
Cherokee
Horned Serpent
The story of Aganunitsi; other Cherokee oral traditions
Umibōzu
Japanese
Umi-bōzu, Sea Monk
*Konjaku Hyakki Shūi*; various nautical folklore tales
Urayuli
Yup’ik
Hairy Men
Yup’ik oral traditions of Southwestern Alaska
Urisk
Scottish
Ùruisg
Folklore of the Scottish Highlands
Unktehila
Lakota
Unk, Uncegila, Horned Water Serpent
Lakota creation and hero myths
Urmahlullu
Mesopotamian
Lion-man, Lion-centaur
Depicted on Assyrian palace reliefs and cylinder seals
Uwan
Japanese
–
*Gazu Hyakki Yagyō*; various Edo period yōkai collections
Utukku
Mesopotamian
Udug
Mentioned in various Sumerian and Akkadian incantation texts
Ugallu
Mesopotamian
The Great Weather-Beast
Mentioned in the Babylonian epic *Erra and Ishum*
Umagad
Philippine
Umalagad, Kalag
Visayan animist traditions and folklore
Descriptions
Unicorn
A legendary white horse-like creature with a single, long, spiraling horn on its forehead. Its horn was believed to purify water and heal sickness, making it a symbol of purity and grace.
Undine
A female water elemental or nymph who could gain a human soul by marrying a mortal man and bearing his child. They are beautiful but can be dangerous if betrayed.
Ushi-oni
A fearsome “ox demon” yōkai from Japanese folklore, often depicted with an ox’s head on a spider-like body. It is a brutal, sea-dwelling monster that terrorizes fishermen.
Uktena
A massive, horned serpent-like creature from Cherokee mythology. It had a blazing, diamond-like crystal in its forehead that was a powerful talisman, but its gaze could kill.
Umibōzu
A gigantic, dark, humanoid yōkai with a smooth, round head that rises from calm seas to capsize ships. Its name means “sea monk,” referencing its bald head.
Urayuli
Tall, hairy, Bigfoot-like creatures from Yup’ik folklore. They are said to live in the wilderness, emit high-pitched cries, and sometimes steal food from human camps.
Urisk
A solitary fae creature, often half-human and half-goat, who haunts lonely pools and waterfalls. Though they may try to be helpful, their mischievous nature often causes trouble for humans.
Unktehila
A powerful and dangerous horned water serpent or dragon-like monster from Lakota mythology. They were primal beings who caused floods and were eventually slain by the Thunderbirds.
Urmahlullu
A mythical lion-centaur creature from ancient Mesopotamia. It served as a benevolent guardian spirit, often placed at entrances to ward off evil demons and sickness.
Uwan
A disembodied voice yōkai that haunts abandoned buildings and old temples. It has no physical form and exists only to startle people by shouting “Uwan!” from the darkness.
Utukku
A class of ambivalent spirits or demons in ancient Mesopotamian mythology. They could be benevolent guardians or malevolent entities that caused disease, strife, and misfortune.
Ugallu
A storm demon from Mesopotamian mythology, depicted as a lionine creature with the head and torso of a man and the feet of a bird. Despite its fearsome look, it was a protective being.
Umagad
Ancestral spirits in Visayan folklore. These souls of the dead are not inherently evil but can be mischievous or protective, requiring offerings and respect to remain benevolent to their descendants.
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