The pronunciations I'm familiar with are these:
air-ee-ahna
ar-ee-ahna
are-ee-anna
ahr-ree-ahna
ahr-ree-anna
I know some people who use anna names and pronounce the ana. My two nieces are
Brianna (bree-ahna) and Lilyanna (lil-ee-ahna), so I can see how they might be pronounced the same. I would assume them to be pronounced differently, however.