My father was born in North Dakota which may explain why he pronounced it Rye oh. In Oregon, later, his children permanently came to call it Ree oh. Rye oh hurts my ear. :)

However, a friend of mine, Maine born and bred, grew up singing Rye oh and still does so it's not necessarily an American midwest oddity.

What does bother me is someone paying no attention when he should know better.

Then-President Ronald Reagan greeted the Mexican president with this charming bit: "Me cazza est su cazzah' (mi casa est su casa). Pronouncing the z not as in pizza but as in zebra. What amazed me is that Reagan had spent most of his life next door to Mexico- surely he knew better.