Maybe it's because I have a
German parent and jo-HANN-a is closer to the
German pronunciation which is yo-HAHN-a. It just seems odd to me not to pronounce the H. In New
York I knew a
Johanna who said it the way I like it. I've never met any other girls with the name or heard of any in the US so I don't know if there's a standard pronunciation of it in the US. There are many of them in Germany, though.