So Romanov is also incorrect then?

Yep. If you want to go Russian Russian, Romanova is the only way to go.

I like the mockery idea; it sounds very her

Doesn't it? :D I can see her, rolling her eyes at every wrong attempt at pronouncing her name and telling them "You can call me Natasha. Natasha Romanoff. I like to make it easy for people." and make one feel very embarassed by that :D

Thanks for sharing this, btw. Very cool to know.

You're welcome :) (it helps to be East German for matters like that. Also, my dad got his degree in mathematics from a university in Charkiv, Ukraine on a scholarship programm. That's very practical, too :D)