He just appears if you side with the Christians during the "Shadows over Norfolk" quest. Nothing in the quest gave me the impression I would get a knight until then.

i try to continue the great work of kjeld (viewtopic.php?p=2338#p2338) for the new saxon DLC

Book of Faith :

Sir Osric (level 4 Warlod | Rightful 0 / Christianity 5) - starting knight

Sir Wuffa (level 4 Champion | Rightful 0 / Christianity 5) - starting knight

Sir Ricbert (level 5 Sage | Rightful 0 / Christianity 7) - quest : "Conquer London"

Sir Melodias (level 7 Warlord | Rightful 0 / Christianity 10) - quest : "The Devoted Champion"

Sir Unferth (level 8 Champion | Rightful 0 / Christianity 10) - quest : "The Proud Champion"

Sir Wylford (level 10 Sage | Rightful 5 / Christianity 11) - quest : "The Daring Champion"

Leodegrance (level 9 Sage | Rightful 0 / Christianity 8) - quest : "The Request of Sir Leodegrance"

Sir Tegyr (level 9 Champion | Rightful 8 / Christianity 13) - quest : "Sir Tegyr in Danger"

Sir Percivale (level 11 Sage | Rightful 5 / Christianity 10) - quest : "Sir Percivale"

Sir Galahad (level 15 Champion | Rightful 0 / Christianity 15) - quest : "Sir Galahad"

Sir Mordred (level 15 Champion | Tyrant 15 / Christianity 0) - quest : "Sir Mordred" (only for tyrant players)

Sir Lancelot (level 15 Champion | Rightful 15 / Christianity 0) - quest : "Sir Lancelot" (only for rightful players)


(you can recruit many more heroes from "The Bishop Council", "The Sidhe" and from other kings - its nearly impossible to list them all)