It can also help to compare last names from your characters to the story you're skimming. Ask yourself whether or not your character's last name would fit or stand out in a book with similar themes.
[header] How to make a good last name for characters in a book [title] Skim through other books. [step] Pick up a book in the same genre as the one you're writing. Glance through character or place names in the book to get some ideas.