[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. 
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.