You could make the chapters as long or as short as you want. Short could be as short as one page. Long could be as long as you want it to be. The pages. Well, the number of pages doesn't really matter because you'll only get that number when the book is formatted. That's up to the font, page size, line spacing, and borders, and all that stuff. What's important is the number of words. Novels usually have around or over 100,000 words. And the names, you could name them whatever you want. If your looking for irony, give someone the personality that's opposite of the meaning of their name. Or you could just pick a name that suits the personality of your character.