How do you pronounce Natasha last name properly?

You're asking about the pronunciation of the last name "Natasha", but that's not a last name. It's a first name, often associated with the Russian culture.

If you're looking for a last name, you'll need to provide me with the full name or the last name itself.

For example, if you're asking about the last name of the character "Natasha Romanoff" from Marvel Comics, it's "Romanoff", pronounced "ROH-muh-nahf".

Please provide me with the full name or last name you're interested in, and I'll be happy to help with the pronunciation.