In 117 AC, Rhaenyra gave birth to her third son, whom Laenor named Joffrey, in honor of Ser Joffrey Lonmouth.
Jacaerys Velaryon Is Rhaenyra's Firstborn Son and Heir
Firstborn son of Rhaenyra and her first husband Laenor Velaryon, Jacaerys was affectionately known to his family as Jace.
Jacaerys, Rhaenyra's eldest son, and his two younger brothers have spent their short lives surrounded by whispers that their real father was Ser Harwin Strong. It's an open secret that these “strong” boys aren't the sons of Laenor Velaryon.
It is quickly confirmed that Alicent is right, however. Rhaenyra's sons are bastards. They're the illegitimate children of Rhaenyra and Ser Harwin Strong (Ryan Corr). The issue of the children's legitimacy is an open secret at court, with people turning a blind eye because the king does.
Daemon and Rhaenyra share two children together: Aegon III and Viserys II.
Daemon and Rhaenyra really commit to the whole "keeping the bloodline pure" thing by having three — count 'em, three — children together. So in addition to Rhaenyra's three sons with her first baby daddy Harwin (RIP), she has one daughter and two sons by baby daddy two, Daemon.
The shock of the loss of her father, combined with the Greens' ruthless betrayal sends her into early labor. Without modern medicine, a baby born so early had very little chance of survival in the best of circumstances - and in these terrible conditions the baby, a girl named Visenya, is stillborn.
Even Laenor, Rhaenyra's husband, hints that he knows the princes are not biologically his children in Episode 6.
Laenor and Rhaenyra had three sons together: Princes Jacaerys 'Jace', Lucerys 'Luke', and Joffrey 'Joff' Velaryon.
Laenor didn't have children because he didn't want to, not because he was incapable (as in he was impotent, sterile, or had a condition that lowered his ability to sire children, such as undescended testicles, hypospadias, or chordee.)
Like Laenor Velaryon's sexuality, it was a “known secret” in the Red Keep that Harwin Strong was the father to Rhaenyra's three children: Jacaerys, Lucerys, and Joffrey.
In the books, they have three: daughter Visenya, who does not survive infancy; and two sons, Aegon III and Viserys II, who will grow up to be next Kings of the Andals, the Rhoynar, and the First Men.
Ser Laenor and Princess Rhaenyra had three sons, Jacaerys Velaryon, Lucerys Velaryon and Joffrey Velaryon. Although due to the traits of these three, and Laenor spending very little time with Princess Rhaenyra, it was clear that Jacaerys, Lucerys, and Joffrey were not his children.
The two have been dancing around each other since the beginning of the series engaging in a will-they-won't-they dynamic, Episode 7 "Driftmark" not only saw the two of them consummate their love but also faking the death of Rhaenyra's husband Laenor (John Macmillan) together in order to marry each other on Dragonstone.
In Fire & Blood, the book House of the Dragon is based on, Daemon and Rhaenyra go on to have two boys: Aegon and Viserys. Yup, another Aegon and another Viserys. They also have a daughter, Visenya, but she is sadly a stillborn baby.
She confirmed that her marriage to Laenor Velaryon (John Macmillan) was merely for show. "We did try to conceive a child," she shared with Daemon.
When finally did give birth to the baby, it is said that the child had a hole where her heart should have been, a tail, and scales for skin—a monster, as her mother had cursed her to be. Upon her death, Rhaenyra swore yet another vow.
Prosthetic designer confirms: the baby was deformed
The dead girl had been named Visenya. “ The baby was clearly among those rare cases in the Targaryen line, where it was described that an unsuccessful birth had produced a stillborn baby with dragon-like features.
Rhaenyra's children are bastards, and Vaemond finally let everyone know in Episode 8, as loudly as he possibly could. For that, he lost his head, though Daemon let him keep his tongue. Obviously, the true parentage of Rhaenyra's children is a big deal.
It isn't explicitly stated in the show, but because we learn after episode six that all three boys have dark brown hair — and despite Rhaenyra and Laenor's matching blond color — it has been strongly implied that they are actually the children of Ser Harwin Strong, the Lord Commander of the City Watch.
Perhaps there isn't romantic love between Laenor and Rheanyra, but they do have compassion for each other, and they're friends in many ways. They've been married for ten years, and they've known each other since they were children. It's a relationship that's lasted most of their lives.
After Daemon's first wife dies, he gets together with Laena Velaryon—who was initially suggested as a bride for King Viserys. They have two daughters. Meanwhile, Rhaenyra marries Laena's brother, Laenor Velaryon, and they have several kids.
With him, she found a love so deep it filled the void in her heart, not to mention her womb. In 196 AC, the year of their marriage, she painstakingly produced a set of twins, Aegon and Aella.
Although Rhaenyra's mother's death initially made her fear the notion of bearing heirs, adult Rhaenyra Targaryen now has five sons in House of the Dragon – three healthy boys with Laenor Velaryon (fathered by Harwin Strong) and two silver-haired boys with her husband Daemon Targaryen.