House of the Dragon Family Tree – Targaryen Lineage Explained

The House of the Dragon family tree branches across generations of incestuous marriages, dragon-bonded bloodlines, and competing claims to the Iron Throne. Centered on the reign of Viserys I Targaryen, the lineage splits into two warring factions—the Blacks and the Greens—whose conflict plunges Westeros into the brutal civil war known as the Dance of the Dragons. Understanding these relations requires tracing not only the direct descendants of Old Valyria but also the strategic unions with House Velaryon that complicate succession.

Targaryen dynastic tradition demands the preservation of “blood of the dragon” through sibling and avuncular marriages, a practice that concentrates power yet breeds instability. When Viserys I names his daughter Rhaenyra heir over his son Aegon II, he triggers a crisis that pits niece against half-brother, uncle against nephew, and dragon against dragon. The resulting genealogy is a web of legitimate children, disputed bastards, and second marriages that determines the fate of the Seven Kingdoms.

House Targaryen Family Tree Explained

The lineage begins with the dragonlords of Old Valyria, specifically Daenys the Dreamer, whose prophetic vision of the Doom prompted her father Aenar to relocate the family to Dragonstone. This migration preserved their dragons while the Freehold collapsed, establishing the sigil of a three-headed red dragon on black with the words “Fire and Blood.” The family maintains its draconic heritage through strict endogamy, marrying brother to sister and uncle to niece to ensure the bloodline remains pure enough for dragon-bonding.

• Targaryens practice systematic incest to preserve dragon-bonding bloodlines and Valyrian purity.
• Viserys I names Rhaenyra heir in 105 AC, but later sires Aegon II with Alicent Hightower, creating competing claims.
• Rhaenyra’s first three sons—Jacaerys, Lucerys, and Joffrey—bear the brown hair of Harwin Strong despite their official Velaryon parentage.
• House Velaryon provides crucial naval power and Valyrian blood through marriages to both Rhaenys and Rhaenyra.
• Rhaenys Targaryen, the “Queen Who Never Was,” is passed over for the throne in 101 AC due to male primogeniture.
• The Dance of the Dragons eliminates most dragons and nearly extinguishes the Targaryen line.
• Jaehaerys I fathered thirteen children, though the show simplifies this to focus on the Aemon-Baelon-Viserys succession line.

Rhaenyra vs Aegon II: Key Relations in the Succession Crisis

Rhaenyra and Aegon II share the same father but different mothers, establishing them as half-siblings with mutually exclusive claims. Born in 105 AC to Viserys I and his first wife Aemma Arryn, Rhaenyra grows up as the king’s only living child until age seven, when she is formally named heir to the Iron Throne. This designation occurs in 112 AC, years before Viserys remarries Alicent Hightower and fathers Aegon II in 120 AC.

The Primogeniture Conflict

Despite Rhaenyra’s prior appointment, the Green Council—led by Alicent and her father Otto Hightower—cites Andal tradition and male preference to argue that Aegon II, as the king’s eldest son, supersedes his older half-sister. This interpretation directly contradicts Viserys’ dying wish, creating the casus belli for civil war. The conflict reopens old wounds from the 101 AC Great Council, which chose Viserys over his cousin Rhaenys for similar reasons of gender.

The Green Council’s Coup

Upon Viserys’ death in 129 AC, Alicent’s faction quickly gathers at the Red Keep to crown Aegon II before Rhaenyra learns of her father’s passing. This secrecy prevents the rightful heir from consolidating power in King’s Landing, forcing her to retreat to Dragonstone where she holds her own coronation. The immediate result is a schism where two Targaryens simultaneously claim the throne, each commanding significant dragon support and territorial loyalty.

Daemon Targaryen and Rhaenyra’s Relationship

Daemon Targaryen occupies dual roles as Rhaenyra’s paternal uncle and eventual husband, a union that typifies the dynasty’s strategic incest. As the younger brother of Viserys I, Daemon holds a strong blood claim to the throne himself, yet he dedicates his martial prowess and dragon Caraxes to securing Rhaenyra’s position. Their marriage after the death of her first husband consolidates the Blacks’ military leadership under a single dragonriding command.

Avuncular Marriage Strategy

Daemon’s third marriage to Rhaenyra follows the Valyrian custom of keeping power within the family bloodline. Prior to this, he wed Rhea Royce—who died under suspicious circumstances—and then Laena Velaryon, with whom he had daughters Baela and Rhaena. By wedding Rhaenyra, Daemon ensures that any children they produce possess undiluted Targaryen ancestry, strengthening the legitimacy of her claim against Aegon II’s purebred lineage.

Political and Military Alliance

The union transforms Daemon from a rogue claimant into the Queen’s consort and protector. Together they produce two sons who survive infancy: Aegon III and Viserys II, both of whom eventually sit the Iron Throne. This marital alliance also binds the Velaryons closer to the Black faction, as Daemon’s previous marriage to Laena Velaryon had already produced dragonrider Baela, betrothed to Rhaenyra’s heir Jacaerys.

House Velaryon Connections to the Targaryens

House Velaryon of Driftmark provides the Targaryens with their most powerful vassals and marriage allies, despite lacking dragons themselves before the current generation. Descended from ancient Valyrian stock like the Targaryens, the Velaryons control the largest navy in Westeros and command significant wealth through maritime trade, earning Lord Corlys Velaryon the title “Sea Snake.”

The Sea Snake’s Bloodline

Corlys Velaryon marries Rhaenys Targaryen, the king’s granddaughter who was denied the throne in 101 AC. This union produces Laena and Laenor Velaryon, both of whom marry into the main Targaryen line. Laenor becomes Rhaenyra’s first husband, while Laena marries Daemon Targaryen before his union with Rhaenyra. These intermarriages make the Velaryons central to both factions, though they predominantly support the Blacks due to Rhaenys and Corlys’s alignment with Rhaenyra.

Rhaenyra’s Velaryon Sons

Rhaenyra bears three sons—Jacaerys, Lucerys, and Joffrey—during her marriage to Laenor Velaryon. While officially recognized as Velaryons and given the family name, all three lack the silver hair and violet eyes characteristic of Valyrian nobility, instead displaying the brown hair and sturdy build of Ser Harwin Strong. Book sources explicitly identify Strong as their biological father, while the show conveys this through visual cues and intimate scenes between Rhaenyra and Harwin.

Chronology of the Targaryen Civil War

The family tree’s fractures harden into armed conflict through a sequence of births, deaths, and coronations spanning three decades. Understanding the timeline clarifies how Viserys’ peaceful reign descends into dragon warfare.

1. 101 AC: The Great Council names Viserys heir over his older cousin Rhaenys, establishing male primogeniture precedent. Source
2. 105 AC: Rhaenyra born to Viserys and Aemma Arryn; named heir after her father’s sons die in infancy.
3. 112 AC: Viserys formally confirms Rhaenyra as Princess of Dragonstone and heir apparent.
4. 120 AC: Aegon II born to Viserys and Alicent Hightower, creating a rival claim.
5. 122 AC: Jacaerys Velaryon born to Rhaenyra (officially Laenor’s son).
6. 129 AC: Viserys I dies; the Greens crown Aegon II in King’s Landing while the Blacks crown Rhaenyra at Dragonstone. The Dance of the Dragons begins.
7. 131 AC: War effectively concludes with the deaths of both Aegon II and Rhaenyra, though fighting persists into 131 AC.

Book vs Show Family Tree Differences

George R.R. Martin’s Fire & Blood presents the Targaryen history as an unreliable chronicle compiled by archivists, while HBO’s adaptation makes definitive narrative choices that alter certain genealogical details.

Why Bloodline purity Determines Targaryen Politics

The intersection of genealogy and power in House of the Dragon stems from the unique nature of dragon ownership. Unlike other Westerosi houses who base authority on military might or feudal obligation, the Targaryens derive supremacy from their monopoly on dragons—creatures that require specific, possibly genetic, affinity to master. This biological necessity justifies their rejection of Andal marriage customs in favor of Valyrian endogamy.

When Viserys I attempts to override the traditional male preference in favor of his chosen heir, he challenges not merely custom but the biological anxiety underlying Targaryen rule. The Greens’ insistence on Aegon II reflects a belief that only male-line Targaryens possess the requisite “dragon blood” to control the beasts, while the Blacks argue that Rhaenyra’s documented dragonbond with Syrax proves her legitimacy regardless of gender. This genetic mysticism transforms a family tree into a battleground of eugenics and prophecy.

Primary Sources and Historical Records

The Targaryen genealogy derives from multiple in-universe and real-world sources. Archmaester Gyldayn’s histories, compiled in Fire & Blood, provide the foundational chronology, though the text acknowledges contradictions between court records and private memoirs. The Westeros.org wiki cross-references these accounts with heraldic data to establish consistent parentage.

HBO’s official production materials and canonical episode guides confirm character relationships for the television adaptation, noting where showrunners Ryan Condal and Miguel Sapochnik diverge from Martin’s ambiguous historical text. Visual family trees published by Time and UsefulCharts further clarify the complex intermarriages between Targaryens and Velaryons for contemporary audiences.

The Targaryen Lineage at War

The House of the Dragon family tree represents more than royal genealogy; it maps the fault lines of a civilization-shattering conflict. With Rhaenyra’s Blacks and Aegon II’s Greens each claiming divine right through the same bloodline, the Dance of the Dragons becomes an inevitable reckoning with the contradictions of Targaryen rule. As dragons die and branches wither, the tree narrows toward the eventual extinction of the beasts and the transformation of Westerosi monarchy. For a visual overview of the complete lineage, see the Targaryen Family Tree Overview.

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