Elwin Ransom
Elwin Ransom may be based on C. S. Lewis' friend J. R. R. Tolkien ("Elwin" means "Elf friend" in Anglo-Saxon), though he seems to have autobiographical elements. In "That Hideous Strength" Ransom, with his royal charisma and matter-of-fact breezy acceptance of the supernatural, appears less like Tolkien than like Charles Williams (or some of the heroes in Williams' books).
The House of the Wolfings
"The House of the Wolfings" was one of the influences on J. R. R. Tolkien's popular "The Lord of the Rings". In a December 31, 1960 letter published in "The Letters of J. R. R. Tolkien", (p. 303), Tolkien wrote: 'The Dead Marshes and the approaches to the Morannon owe something to Northern France after the Battle of the Somme. They owe more to William Morris and his Huns and Romans, as in "The House of the Wolfings" or "The Roots of the Mountains"." Among the numerous parallels with "The Lord of the Rings", Morris has Old English-style placenames such as Mirkwood (p. 2) and the Mark (title page), Germanic personal names such as Thiodolf (p. 8), and dwarves as skilled smiths ("How the Dwarf-wrought Hauberk was Brought away from the Hall of the Daylings", p. 97).