[name]Arianna[/name]: I pronounce the anna ending like the name “[name]Anna[/name],” so I’d pronounce this Ahr-ee-anna. [name]Ana[/name] is “ahna,” so I personally think that the [name]Ariana[/name] spelling may be more likely to elicit your pronunciation. I’ve heard this name butchered often, with [name]Air[/name]-ee-anna ([name]Larry[/name] [name]King[/name] says it this way, I think).
[name]Eliana[/name]: I love this name, and have never heard it mispronounced.
[name]Elena[/name] (Eh-lay-nah): I love this name, too, and know and [name]Elena[/name] (el-len-uh) whose name was constantly pronounced (mispronounced, in her case) [name]El[/name]-[name]LAY[/name]-nuh, so I’m guessing that [name]El[/name]-[name]LAY[/name]-nah (I’m spelling it differently than you did, but I’m pronouncing it the same way) is the more common pronunciation.
[name]Maia[/name]: I think this is so pretty, too.
[name]Talia[/name]/[name]Thalia[/name]: I love [name]Talia[/name], without the h. I think it’s gorgeous!
[name]Serena[/name] (I would like to encourage the Se-reh-nah pronounciation, if that makes sense, although I know most people would pronounce it Se-reen-ah): Yeah, I think that it will likely more often than not be pronounced Ser-ee-na, which is the only way I’ve ever heard it pronounced.
Taking pronunciation issues into account, my favorites are [name]Eliana[/name], [name]Maia[/name], and [name]Talia[/name].
I love your names!