|Born||In or before 16 AC|
|Died||In 59 AC|
|Spouse||Lady Jocasta Tarbeck|
Lyman Lannister was the Lord of Casterly Rock, Warden of the West, Shield of Lannisport, and head of House Lannister during the reign of King Maegor I Targaryen and the early reign of King Jaehaerys I Targaryen. He was married to Lady Jocasta Tarbeck.
Lyman was a cunning and powerful lord. He was an ambitious man who wanted to raise the influence of House Lannister above the Velaryons, Baratheons, and Hightowers. Rhaena Targaryen believed that he sought a dragon of his own to match the power of House Targaryen. Lyman was alleged to be the richest lord in Westeros. King Jaehaerys I Targaryen distrusted Lord Lyman and considered him too proud.
Reign of Maegor
After the death of King Aenys I Targaryen, Lord Lyman offered his protection to Prince Aegon and Princess Rhaena Targaryen at Casterly Rock, after they abandoned their royal progress in the westerlands in fear of their usurping uncle, Maegor I. While the two were at Casterly Rock, Lyman's own wife, Lady Jocasta, discerned that Rhaena was with child. Lyman extended guest right and refused King Maegor's demands to turn the prince and princess over, but he did not pledge his swords to the fugitive Aegon's cause. He did not stir himself from Casterly Rock when Aegon gathered his followers at Pinkmaiden Castle, but five hundred men joined Aegon's cause under the banner of Lyman's bastard son Ser Tyler Hill, allowing Lyman to lend support to the young prince while keeping his hands clean. However, Aegon perished at his uncle's hands during the Battle Beneath the Gods Eye in 43 AC.
The battle left Lord Alyn Tarbeck slain and his wife Jeyne Westerling widowed. A younger son of Lord Lyman was courting Jeyne when King Maegor summoned her to court and wed her in 47 AC. Maegor confirmed Jeyne's son by her previous marriage as the Lord of Tarbeck Hall and the boy was sent to Casterly Rock to be fostered by Lyman. Meanwhile, Ser Joffrey Doggett led the Warrior's Sons against Maegor throughout the westerlands, but Lyman had no inclination to move against him. When Prince Jaehaerys Targaryen put forward his claim to the Iron Throne, Lyman rallied to his support.
Reign of Jaehaerys
Lord Lyman and Lady Jocasta went to Faircastle in 49 AC to assist at the wedding of Rhaena Targaryen and Androw Farman, the youngest son of his vassal Lord Marq Farman; Lyman was the only great lord in attendance for the wedding. Later that year, Lyman traveled to King's Landing along with three hundred knights from Casterly Rock for the wedding of Queen Alyssa Velaryon to Lord Rogar Baratheon.
The following year, after the death of Lord Farman, Lyman hosted Rhaena and her retinue for more than a month. Lyman held a lavish feast in their honor and provided Rhaena and her companions with regal apartments. Lyman's generous hospitality was not without purpose: he wanted an alliance with the Iron Throne by wedding either his bastard son, Tyler Hill, or one of his trueborn sons to Rhaena, and he wanted a dragon of his own. Lyman sought to raise the Lannisters to become the "second house" in the realm. When Rhaena discovered Lyman's intentions, she left Casterly Rock.
Though Lyman was never part of King Jaehaerys I's small council, the Lord of Casterly Rock was suggested to fill various offices by the king's advisors. In 50 AC, after the king had dismissed Lord Edwell Celtigar, several of the king's advisors suggested for Lyman to be named master of coin for he was the richest lord in the realm, but Jaehaerys was disinclined and named Rego Draz instead. Lyman was considered as master of coin a second time in 59 AC after the murder of Rego Draz, but Jaehaerys thought him too proud. When Lord Daemon Velaryon stepped down as Hand of the King, Lyman was briefly considered as an option for the office, but the king distrusted the lord and passed over him. Lyman traveled a second time to King's Landing in 58 AC for the tourney celebrating the tenth year of King Jaehaerys I Targaryen's reign.
Quotes about Lyman
—Rhaena Targaryen about Lyman
- Fire & Blood, The Sons of the Dragon.
- See the Lyman Lannister calculation.
- Fire & Blood, The Long Reign - Jaehaerys and Alysanne: Policy, Progeny, and Pain.
- The Sons of the Dragon.
- Fire & Blood, A Surfeit of Rulers.
- Fire & Blood, A Time of Testing - The Realm Remade.
- Fire & Blood, Birth, Death, and Betrayal Under King Jaehaerys I.
- The World of Ice & Fire, The Westerlands: House Lannister Under the Dragons.
- Fire & Blood, The Year of The Three Brides - 49 AC.
- Fire & Blood, Jaehaerys and Alysanne - Their Triumphs and Tragedies.