Targaryen dynastic marriage custom

The Targaryen dynastic marriage custom was the royal family’s practice of marrying close kin, including siblings, uncles and nieces, and cousins, wherever possible. It shaped the Targaryens’ household and succession planning, but did not exclude marriages beyond the family: those matches could connect distant regions, reconcile rival houses, or advance political claims. Across the dynasty’s history, marriage served at once as a means of family continuity and an instrument of rule.

The royal custom and its limits

The custom is described as a continuing Targaryen practice rather than as a rule that determined every marriage. Its clearest expression came in the marriages of King Aegon I Targaryen, who took both his sisters, Rhaenys and Visenya, as wives. Their sons, Aenys and Maegor, did not have sisters to marry, so each had to seek a bride elsewhere. The family’s preferences therefore operated within the circumstances of each generation rather than prescribing a single match for every prince or princess.

Aenys married Alyssa Velaryon, daughter of Aethan Velaryon, in 22 AC. Both were fifteen, and their shared Valyrian ancestry made the union a marriage between cousins. The match shows how the custom could extend beyond sibling marriage while keeping royal kinship close. It also proved happy and fruitful: their children included Rhaena, Aegon, Viserys, Jaehaerys, and Alysanne, enlarging the royal family and supplying the next generation of potential heirs.

Maegor’s marriage to Ceryse Hightower shows that family preference could meet religious resistance. Queen Visenya proposed that the infant Rhaena be betrothed to Maegor, but Aenys and Alyssa opposed the match, and the High Septon warned that the Faith would not welcome it. Maegor instead married Ceryse, the High Septon’s niece, in the Starry Sept in 25 AC. The arrangement connected the prince to a powerful family outside the immediate royal line and took place within an uneasy religious accommodation: during Aegon’s reign, the High Septons did not openly condemn the king’s marriages to his sisters, but did not declare them lawful either, while many humbler members of the Faith considered sibling marriage sinful.

Marriage as a means of joining the realm

Royal marriages formed only one part of a wider political use of marriage. Aegon I and his sisters sought to reconcile the conquered kingdoms by bringing people from across the realm into court and by encouraging alliances between noble houses. Their policy was not limited to the Targaryen family: marriages could turn former rivalries into kinship and make the new realm more closely connected.

The matches arranged by Aegon’s queens show the range of that work. Ronnel Arryn, Lord of the Eyrie, married a daughter of Torrhen Stark of Winterfell, while the heir to Casterly Rock married a Redwyne girl from the Arbor. Queen Rhaenys arranged marriages for the three daughters of the Evenstar of Tarth with House Corbray, House Hightower, and House Harlaw. Queen Visenya brokered a double wedding between House Blackwood and House Bracken, matching a son of each family with a daughter of the other to seal peace between houses whose enmity went back centuries. In another instance, Rhaenys found a Rowan girl serving her a husband in White Harbor and arranged for a knight in Lannisport to foster the girl’s child. These examples place dynastic marriage within a larger program of alliance-making, while showing that royal intervention could reach beyond heirs and great lords.

Kinship, succession, and political claims

A marriage within the dynasty could also make inheritance disputes more immediate. When Aenys and Alyssa’s daughter Rhaena was born, her place in the succession raised the question of whether Maegor remained second in line or should stand behind his niece. Visenya’s proposed betrothal of the infant to Maegor was an attempt to address that question through marriage; the opposition of Aenys and Alyssa, together with the High Septon’s warning, prevented it. The episode shows how a royal match could be proposed not only to create a family bond but also to manage competing claims.

The marriage of Princess Rhaenys, daughter of Prince Aemon, to Corlys Velaryon likewise connected royal descent to a great house beyond the immediate dynasty. When Aemon died, Rhaenys was pregnant. Jaehaerys’s decision to name Baelon heir therefore passed over not only Rhaenys but potentially her unborn son. The marriage itself did not resolve the succession, but it made the consequences of the king’s choice extend through another powerful family and into the next generation.

A later proposal to join the royal family to House Manderly illustrates the use of an unfulfilled marriage promise as political leverage. Desmond Manderly reminded Jacaerys Velaryon that the Old King had once offered Princess Viserra to Manderly’s ancestor, but that she died and the promise was forgotten. Jacaerys understood the request and left White Harbor with a compact: after the war, Lord Manderly’s youngest daughter would marry Joffrey Velaryon. Here a proposed royal match became a negotiation over recognition and redress, while the eventual agreement tied the Manderlys to the royal family through a different generation.

The custom in the later dynasty

The family’s close-kin marriages continued under Viserys I. He married his cousin Aemma Arryn, and later arranged the marriage of his eldest son, Aegon the Elder, to his daughter Helaena, following the ancient Targaryen tradition. That sibling marriage produced twins, Jaehaerys and Jaehaera, and later a second son, Maelor. The account presents the wedding as an expression of established family practice, while its children also gave Aegon a line of heirs of his own.

Under Viserys, royal marriages existed alongside a broad network of other family alliances, and the kingdom had more Targaryen princes, princesses, and dragons than at any earlier point. The custom thus belonged to a dynasty whose continuity depended on both its internal family structure and its relationships with the wider realm. Its political effects were never confined to the wedding itself: each match could shape the number and standing of heirs, link powerful houses, or sharpen disagreement over who should inherit.