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).
Tolkien family
Edith Mary Tolkien, born Bratt (21 January 1889 – 29 November 1971) was the wife of J. R. R. Tolkien. She served as the inspiration for his fictional character Lúthien Tinúviel, an Elven princess and the most beautiful of all the Children of Ilúvatar (the name of God in Tolkien's fiction).