The Norse Gods Family Tree

The Norse gods do not descend from a single tidy family tree the way Greek myth's Olympians do — their genealogy runs through giants as often as gods, forks at points the medieval sources never reconcile, and includes at least one branch, Loki's children, that was never meant to inherit anything but doom. Still, a real structure holds it together: everything traces back to the primordial giant Ymir, runs forward through Odin's line and the Vanir line, and tangles hardest around Loki, whose children by a giantess are the fated destroyers of the world he lives in.

In the Beginning: Ymir and the Primordial Beings

Before there were gods there was Ginnungagap, the yawning void between the fire of Muspelheim and the ice of Niflheim, and out of the meeting of heat and cold came the first being: the frost-giant Ymir. Ymir was not alone for long. As he slept, sweat pooled under his arms and grew into more giants, and one of his legs bred a son on the other — the origin, Snorri says, of the entire race of frost-giants. Alongside Ymir the primeval ice also thawed into a cow, Auðhumla, who fed Ymir with her milk and who, licking the salty ice blocks for nourishment herself, freed a being trapped within them: Búri, the first ancestor of the gods, shaped from ice by nothing but the cow's tongue.

Búri had a son, Borr, who married Bestla, daughter of a giant — meaning that from the very first generation, the gods and the giants are kin, not opposites. Their union produced three sons: Odin, Vili, and Vé. These three brothers killed Ymir, and from his body they built the world — his flesh became the earth, his blood the sea, his bones the mountains, his skull the sky. It is worth pausing on the irony baked into this ancestry: the gods who rule the cosmos are only two generations removed, on their mother's side, from the giant they dismembered to make it.

Odin's Household

Odin married Frigg, and together they had at least one son central to the mythology: Baldr, the best-loved of all the gods, whose death at the hands of his blind brother Höðr — engineered by Loki — becomes the great tragedy that shadows everything after it. Baldr in turn married Nanna, who died of grief on his funeral pyre.

Odin's other unions are scattered and, in the sources, only loosely reconciled with each other. By the giantess Jörð ("Earth") he fathered Thor, the thunder-god and by far the most prominent of his children in the surviving myths. By the giantess Gríð he fathered Víðarr, "the silent god," destined to avenge his father at Ragnarök. A son named Váli was born to Odin specifically to avenge Baldr, growing to full size within a single day for the sole purpose of killing Höðr. The god Bragi is generally counted as Odin's son too, though the Prose Edda is not explicit about his mother. Hermóðr is named in some sources as Odin's son and rides to Hel to beg for Baldr's release. This is genealogy as the Norse actually practiced it: less a chart than a set of claims recorded in different poems at different times, not always squared with one another.

Odin's two brothers, Vili and Vé, appear at the creation of the world and, in one unsettling aside in the Ynglinga Saga, are said to have shared Frigg during one of Odin's long absences — but they otherwise disappear from the mythology almost entirely, genealogical loose threads that the sources never picked back up.

Thor's Line

Thor married Sif, a goddess best known for her hair of spun gold. Their son Móði ("wrath") and Thor's son by the giantess Járnsaxa, Magni ("might"), are prophesied to survive Ragnarök and inherit their father's hammer, Mjölnir, once the dust settles. Thor also had a daughter, Þrúðr, named in a few sources but given almost no story of her own.

The Children of Loki: The Doom-Bearing Branch

No branch of the family tree matters more to the ending of the myths than Loki's. Loki is himself an outsider by blood — his father is the giant Fárbauti and his mother the being Laufey, and the sources you can read on Fárbauti and Laufey disagree even about which parent gave him his name. Loki is blood-brother to Odin and lives among the Æsir, but his children by the giantess Angrboða are raised outside Asgard and are, without exception, forces the gods must eventually contain or destroy: the wolf Fenrir, bound with the unbreakable ribbon Gleipnir after he bites off Týr's hand; the World Serpent Jörmungandr, thrown into the sea to encircle Midgard, where he waits to fight Thor at Ragnarök; and Hel, cast down to rule the realm of the dead that carries her name.

Loki had other children by other means, each stranger than the last. By the stallion Svaðilfari — while Loki himself had taken the form of a mare — he gave birth to Sleipnir, Odin's eight-legged horse, making Loki simultaneously father and mother to one of the mythology's great treasures. With his wife Sigyn, Loki had two sons, Narfi and Váli; after the death of Baldr, the gods turn Váli into a wolf, and he kills his own brother Narfi, whose entrails are then used to bind Loki to a rock for his punishment.

The Vanir Line

The Vanir trace a shorter, cleaner line, though it comes with a detail Snorri handles delicately: Njörðr fathered Freyr and Freyja on his own sister, a marriage the Ynglinga Saga says was customary among the Vanir but forbidden once he joined the Æsir. That sister is never named among the gods who came to Asgard — she stayed behind when Njörð was sent as a hostage after the Æsir–Vanir War, and her absence is one of the tree's clean gaps rather than a disputed point.

Njörð's son Freyr married the giantess Gerðr after falling in love with her at a distance, trading away his own magic sword to win her — a bargain the myths say will cost him his life at Ragnarök, when he faces the giant Surtr unarmed. Njörð's daughter Freyja married a figure named Óðr, who wanders away for long stretches while she weeps tears of red gold searching for him; their union produced daughters named in later sources but not given developed myths of their own.

In-Laws and Adopted Kin

The family tree also runs sideways through marriage into the giants, and those unions are as important to the mythology as any blood tie. Skaði, daughter of the giant Þjazi, marries into the Æsir when she comes to Asgard seeking compensation for her father's death and chooses Njörð as her husband, sight unseen, by his feet alone — a marriage the sources agree fails quickly, since neither can bear to leave their own homeland for the other's. Gerðr, discussed above as Freyr's wife, brings giant blood into the Vanir line the same way Bestla brought it into the very first generation of gods. Even Gunnlöð, the giantess who guards the Mead of Poetry and spends three nights with Odin in that myth, is sometimes counted by later tradition as mother to Bragi, though the Prose Edda itself does not commit to this claim outright — another branch the sources gesture toward without confirming.

Where the Sources Disagree

The honest answer to "how does it all connect" is that it often doesn't, cleanly. Snorri's Prose Edda, composed in the 13th century, is working to systematize centuries of oral and poetic tradition that were never meant to form a single genealogical chart — the Poetic Edda's individual poems sometimes give a god a different parent, spouse, or origin than Snorri does, and Saxo Grammaticus's Latin Gesta Danorum recasts several of these figures as human kings and heroes entirely, with no divine ancestry at all. Bragi's mother, the exact mechanics of Heimdall's birth (nine mothers, all sisters, are named in one poem and nowhere else), and the fate of Njörð's unnamed Vanir wife are all places where the tree simply stops rather than resolves. Treat any family tree of the Norse gods, including this one, as the best reconstruction the surviving texts allow — not as a settled document the Vikings themselves would have recognized as complete.