Book V
Tristram's beloved; the cause of conflict with King Mark.
How King Arthur held a parliament at York, and how he ordained the realm should be governed in his absence
Referenced as the reason Launcelot left Tristram with King Mark.
Book VIII
The Irish princess destined for King Mark but bound to Tristram through the love potion; key to the tragic romance.
How Sir Tristram was put to the keeping of La Beale Isoud
Heals Tristram's wound, grows fond of him, tells him of the tournament, and secretly provides him with horse and armor.
How Sir Tristram Won the Degree at a Tournament in Ireland
Orchestrates Tristram's entry into the tournament, feels love for him, and rejoices in his victory.
How the queen espied that Sir Tristram had slain her brother Sir Marhaus by his sword, and in what jeopardy he was.
Daughter of King Anguish and Queen Anguish; she loves Tramtrist and is distressed by her mother's discovery.
How Sir Tristram departed from the king and La Beale Isoud out of Ireland for to come into Cornwall
Grieves at Tristram's departure, exchanges rings with him, and promises not to marry for seven years without his consent.
How the lady forsook Sir Tristram and abode with Sir Bleoberis, and how she desired to go to her husband
Mentioned implicitly as the lady is not Isoud; not directly present.
How King Mark sent Sir Tristram for La Beale Isoud toward Ireland, and how by fortune he arrived into England
The lady for whom King Mark sends Sir Tristram to Ireland, praised by Tristram for her beauty and goodness.
How Sir Tristram rescued a child from a knight, and how Gouvernail told him of King Anguish
Mentioned as the daughter of King Anguish, for whose sake Tristram agrees to fight.
How Sir Blamore desired Tristram to slay him, and how Sir Tristram spared him, and how they took appointment.
Rejoices greatly at Sir Tristram's return to Ireland, for she loves him most of all men.
How Sir Tristram demanded La Beale Isoud for King Mark, and how Sir Tristram and Isoud drank the love drink.
Given to Tristram to wed King Mark, but drinks the love potion with Tristram and falls in love with him.
How Sir Tristram and Isoud were in prison, and how he fought for her beauty, and smote off another lady’s head.
Held in prison with Tristram; her beauty is judged fairer than the lord's lady, sparing her life.
How Sir Galahad fought with Sir Tristram, and how Sir Tristram yielded him and promised to fellowship with Launcelot
Present as the lady Sir Tristram is escorting to marry King Mark of Cornwall.
How Sir Launcelot Rescued Sir Gawaine from Sir Carados, and Sir Tristram Departs for Cornwall
Travels with Sir Tristram to Cornwall.
Of the Wedding of King Mark to La Beale Isoud
Married to King Mark but continues to love Tristram; grieves for Bragwaine and rashly promises a boon to Palamides.
The Abduction of Queen Isoud
Taken by Palomides after her promise, escapes into the forest, and is sheltered by Sir Adtherp.
How Sir Tristram rode after Palamides, and how he found him and fought with him, and by the means of Isoud the battle ceased.
Watches the battle from the walls, intervenes to stop the fight, and sends Palamides to Arthur's court.
How Sir Tristram brought Queen Isoud home, and of the debate of King Mark and Sir Tristram
Returned to King Mark by Tristram; her relationship with Tristram is suspected by Sir Andred.
How Sir Lamorak jousted with thirty knights, and Sir Tristram at the request of King Mark smote his horse down
Present with King Mark in the forest, watching the jousting.
XXXIV
Drinks from the horn and is found false; later caught with Tristram.
How Sir Tristram was holpen by his men, and of Queen Isoud which was put in a lazar-cote, and how Tristram was hurt
Put in a lazar-cote, rescued by Tristram, then captured by King Mark and kept isolated from Tristram.
How Sir Tristram served in war King Howel of Brittany, and slew his adversary in the field
Tristram's first lady, Queen of Cornwall, whom he nearly forsakes for Isoud la Blanche Mains.
How Sir Suppinabiles told Sir Tristram how he was defamed in the court of King Arthur, and of Sir Lamorak.
Writes a letter to Queen Guenever complaining of Tristram's unfaithfulness.
How Sir Tristram and his wife arrived in Wales, and how he met there with Sir Lamorak
Isoud la Blanche Mains, Tristram's wife, is injured in the shipwreck.
How Sir Tristram fought with Sir Nabon, and overcame him, and made Sir Segwarides lord of the isle
Grieves upon hearing that Tristram is wedded to Isoud la Blanche Mains.
Book IX
Queen of Cornwall, beloved of Tristram, source of conflict with King Mark.
How La Beale Isoud sent letters to Sir Tristram by her maid Bragwaine, and of divers adventures of Sir Tristram
Sends piteous letters to Tristram via Bragwaine, inviting him and his wife to her court.
XI
Referenced as the queen whom the horn was meant to dishonor.
How Sir Tristram came to La Beale Isoud, and how Kehydius began to love Beale Isoud, and of a letter that Tristram found
Overjoyed at Tristram's return; swoons with joy; writes a letter to comfort Kehydius, causing Tristram's jealousy.
XVIII
Lies sick in bed, making great dole over Tristram's condition.
XIX
Commands Sir Kehydius out of Cornwall, indirectly causing his journey.
The False Report of Tristram's Death
Grief-stricken by the false news, she attempts suicide but is stopped by King Mark.
How King Mark found Sir Tristram naked, and made him to be borne home to Tintagil, and how he was there known by a brachet.
Visits the sick man, recognizes Tristram through the brachet, and warns him of King Mark's likely reaction.
How King Mark Banished Sir Tristram
Mentioned as Queen Isoud, for whom Tristram fought and risked danger.
How Damosel Bragwaine Found Tristram Sleeping by a Well
Sends letters to Tristram via Dame Bragwaine, containing piteous complaints.
How Sir Tristram took with him the shield, and also how he slew the paramour of Morgan le Fay.
Mentioned by Sir Hemison as the lady with whom Sir Tristram is thought to be.
Book X
Tristram's beloved, central to the theme of love and adultery.
How for the despite of Sir Tristram King Mark came with two knights into England, and how he slew one of the knights
She secretly sends spies to learn of Tristram's deeds, rejoicing in his success while fearing Mark's wrath.
How King Mark came to a fountain where he found Sir Lamorak complaining for the love of King Lot's wife
Mentioned as King Mark's fair queen, praised for her worship.
How King Mark and Sir Dinadan heard Sir Palomides making great sorrow and mourning for La Beale Isoud
Object of Sir Palomides' lament; praised as fairest of all and beloved by Sir Tristram.
How King Mark had slain Sir Amant wrongfully to-fore King Arthur, and Sir Launcelot fetched King Mark to King Arthur.
Mentioned by Sir Amant in his dying message.
How Sir Dinadan told Sir Palomides of the battle between Sir Launcelot and Sir Tristam
Mentioned as the reason Palomides will attend the tournament at Camelot.
How King Arthur, the Queen, and Launcelot received letters out of Cornwall, and of the answer again.
Receives letters from Arthur and Launcelot; expresses her pain for Tristram and his for her.
How Sir Elias and Sir Tristram fought together for the truage, and how Sir Tristram slew Elias in the field
Her memory inspires Tristram to rally and win the battle.
How King Mark slew by treason his brother Boudwin, for good service that he had done to him
Warns Anglides to flee with her son to prevent their murder.
How by Treason Sir Tristram Was Brought to a Tournament for to Have Been Slain, and How He Was Put in Prison
Privately seeks Sir Sadok's help to find Sir Tristram after he goes missing.
LI
Grieves over Tristram's imprisonment and conspires with Sir Dinas and Sadok to imprison King Mark so she and Tristram can flee to Logris.
How Sir Tristram and La Beale Isoud came unto England, and how Sir Launcelot brought them to Joyous Gard
Travels with Tristram to England, sends a ring to Launcelot to reveal Tristram's identity, and is placed at Joyous Gard.
LIII
Advises Sir Tristram to ride armed for safety in a strange country.
How Sir Tristram smote down Sir Agravaine and Sir Gaheris, and how Sir Dinadan was sent for by La Beale Isoud
Hosts Sir Dinadan at Joyous Gard and jests with him about love.
LX
Present at Joyous Gard where she laughs at Dinadan's misfortune.
Of the battle between Sir Palomides and the two brethren, and how the two brethren were slain
Present at Joyous Gard with Sir Tristram.
LXV
Travels with Tristram, richly apparelled, and is the object of Palomides' affection.
LXVI
Travels with Sir Tristram and Sir Palomides, and is left at the pavilions with Sir Palomides and Sir Gareth.
LXVII
Tends to Sir Gareth's injuries and asks what ailed him.
LXVIII
Accompanies the knights in green, watches the tournament from a bay window, her face hidden by a wimple.
How Sir Tristram changed his harness and it was all red, and how he demeaned him, and how Sir Palomides slew Launcelot’s horse
Weeps when Tristram is unhorsed, then laughs with joy upon recognizing him, inspiring Palomides.
How King Arthur and Sir Lancelot came to see La Beale Isoud, and how Palomides smote down King Arthur
The fair lady whom Arthur and Launcelot come to see; she is saluted by Arthur and later sent to her lodging in the priory to watch the tournament.
LXXV
Observes Tristram's departure and return to the field.
How Sir Palomides changed his shield and his armour for to hurt Sir Tristram, and how Sir Launcelot did to Sir Tristram.
Watches from a window, weeps and swoons upon seeing Palomides' deceit and the danger to Tristram.
How Sir Tristram departed with La Beale Isoud, and how Palomides followed and excused him
Furious with Palomides for betraying Tristram; she witnessed the entire treason.
How King Arthur and Sir Launcelot came unto their pavilions as they sat at supper, and of Sir Palomides.
Present at the pavilion, rises to greet King Arthur, and is praised by Arthur as the fairest he ever saw.
How Sir Tristram turned to King Arthur’s side, and how Palomides would not.
Is escorted by Tristram and others to Joyous Gard, where they rest.
How Sir Bleoberis and Sir Ector Reported to Queen Guenever of the Beauty of La Beale Isoud
Praised for her peerless beauty, bounty, mirth, and goodness.
How Epinogris complained by a well, and how Sir Palomides came and found him, and of their both sorrowing.
The object of Sir Palomides' unrequited love; she rebuked him and he has lost her favor.
How Sir Palomides and Sir Safere conducted Sir Epinogris to his castle, and of other adventures
Mentioned as Queen Isoud; Palomides asks to be commended to her and asks forgiveness for any trespass.
How Sir Tristram and Launcelot, with Palomides, came to joyous Gard; and of Palomides and Sir Tristram
Object of Palomides' love and the subject of his lament; present at Joyous Gard.
How There Was a Day Set Between Sir Tristram and Sir Palomides for to Fight, and How Sir Tristram Was Hurt
Mentioned as the object of both knights' love and unable to cheer Tristram after his injury.
How Sir Palomides kept his day to have foughten, but Sir Tristram might not come; and other things.
Remains at Joyous Gard, loved by Tristram, who returns to her.
How La Beale Isoud counselled Sir Tristram to go unto the court, to the great feast of Pentecost
Counsels Tristram to go to the feast to preserve his worship, revealing her love and concern for his reputation.
How Sir Tristram departed unarmed and met with Sir Palomides
Sends four knights with Tristram as he departs.
How Sir Tristram and Sir Palomides Fought and Accorded
Mentioned as the cause of Palomides' offense; Palomides declares her peerless.
How King Arthur Handled Sir Urre
Dies swooning upon the corpse of Sir Tristram after his murder.
Of the counsel and advice that was taken by Sir Launcelot and his friends for to save the queen
Mentioned as the lady kept by Tristram at Joyous Gard for nearly three years.
