Eddie Kaspbrak (first appeared in It)

Eddie Kaspbrak is mentioned in the following books:

Misery (Jun 1987)

It's subtly revealed that Paul used to live across the street from the Kaspbraks (which, in turn, reveals that Paul grew up in Derry).

It was summer vacation, his father working, his mother gone to spend the day in Boston with Mrs Kaspbrak from across the street.
- Part II / Chapter 34