How would you pronounce Arianna

[JazzAnnNonMouse]

Ari aaaana
Or
Ari Anna

?

That would be like me saying "my son is called Harry but we pronounce it Hahry. Aren't people who say "Harry" silly!"

DD is Ariana. We pronounce it Ar-ri-ar-na
Only because i really dont like the sound of our Australian friends and family putting the 'a' twang on it...
My aunt makes fun of this by rolling the 'r' like she's speaking italian or something ... Hmph!

She's not right though, NotTreading..., because that's not how we pronounce it. Although British, we live in Spain - no one pronounces it Ari-arr-na here. Ana is pronounced Anna, of course, not Ar-na. Her name came from a German character in a book - also not pronounced Ari-arr-na.

Pronouncenames.com is not necessarily correct - the second suggested pronunciation is uh-ree-ah-na.

She's lived in Australia for 20 odd years though (Abby), maybe that's why she pronounces it annoyingly!

I suppose it's what you prefer. I personally think it sounds nicer our way hence why we hose to pronounce it as we do.
It's a Persian name, also Welsh.
The Greek's, Spanish and Italian's also claim it.
Our Greek friend says ar-ri-ar-na