Sir Lancelot of the Round Table has adventures. [Robin Hood and His Merry Men #32, 36]
The Sorceress of Zoom briefly travels through time from the year 1940 to 6th century Camelot, where she meets Sir Gareth and outwits the sorceress Morgana le Fay, only to be outwitted herself by the wizard Merlin, who sends her back to her own time. [Weird Comics #7]
537 A.D.: Upon his return from a mission abroad, King Arthur learns that his deputy Sir Modred has traitorously seized the throne. Arthur's men battle Modred's men, and Sir Gawain dies. Later, Gawain's spirit warns Arthur not to attack Modred for another month, allowing Sir Lancelot and the knights under his command to return by that time. To postpone the inevitable battle, Arthur holds a parley with Modred, but an accident causes the parley to break into a bloody battle that leaves only four survivors: Arthur, Modred, Sir Lucan, and Sir Bedivere. Arthur battles Modred to the death, killing Modred and becoming mortally wounded himself. Lucan and Bedivere deliver Arthur to a boat taking him to the isle of Avalon, where he is to be tended by Morgana le Fay (his sister, Queen of Gore), Viviane (the Lady of the Lake), and Galis (the Queen of the North). Note: This story indicates that the Arthurian mythos of Earth-4 closely follows Sir Thomas Malory's classic work, Le Morte D'Arthur, published in 1485 by William Caxton. In the Earth-4 universe, Modred (an alternate spelling of Mordred) is not Arthur's son and is apparently not Morgana le Fay's son, either, but instead the son of Arthur's sister Morgause and her husband King Lot of Orkney. Morgana le Fay at this time is still not yet fully evil. Shortly after Arthur's death, Merlin's spell surrounding Camelot vanishes, restoring all of Britain to its ordinary 6th century environs. [Robin Hood and His Merry Men #29]
After the death of King Arthur, Queen Guinevere gives birth to his son and heir, but she hides him away in a nunnery with instructions that his true identity cannot be known until he becomes an adult. Arthur's direct descendants live on through the centuries with this family secret, using their surname Pendragon only amongst themselves. [“Camelot: In Search of the Truth”]
Morgana le Fay gains the secret of immortality and survives into the 20th century, growing in madness and evil as the centuries pass. She has several sons, many of whom are just as mad and evil as she. [“Camelot: In Search of the Truth”]
Upon the passing of Heardred, son of Hygelac, the kingdom of the Geats devolved unto the much praised son of Ecgtheow, Beowulf, proud warrior and prosperous hero. And soon thereupon, the noble and generous Beowulf gave great tracks of land to those most loyal Thanes who fought beside him at Heorot when he slew the monstrous Grendel. And among these Thanes, the good Wigmeric was the first to die, whereupon his eldest son, the young but wise Hrothelac, became Thane of Bagarth and ruled his lands well. [Hercules (Charlton) #1-13]