What does name haseo mean?

"Haseo" is not a common name in any widely recognized language. It's possible that you're thinking of a different name, or that "Haseo" is a made-up name.

If you could provide more context, like:

* Where did you encounter this name? (e.g., a book, a movie, a person)

* What language might it be from?

I'd be happy to help you figure out the meaning!