Generally the pronunciation is a A-duh, like [name]Ava[/name], but technically [name]AH[/name]-duh is correct too. I love the name, but it’ll definitely be confused with [name]Ava[/name]. If that doesn’t bother you, go for it, but expect to correct people ALL the time.
Everything daisy451 said. I have always pronounced it “A-duh” (like [name]Ava[/name]), but I have heard it the other way, too. I prefer the spelling [name]Adah[/name], and perhaps you would get less issues with [name]Ava[/name] (on paper). But I do agree that it might get mixed up with [name]Ava[/name] a lot in the real world. People are much more familiar with hearing that name, and when you say “[name]Ada[/name]”, it sounds so much like [name]Ava[/name] that people will assume it is [name]Ava[/name].
My absolute favorite name but I prefer it spelled [name]Adah[/name]. I think you’d have more trouble with people mishearing it than if they saw it on paper.
I am completely in love with [name]Ada[/name]. I pronounce it Ay-Da (like the start of [name]Aidan[/name], and then duh), but bear in mind I am from NZ.