Personally I pronounce it like
Ariana - just with a 'v' not an 'r'.
Aviana
GraceAviana
HopeAviana
StaciAviana
ZoeAviana
EveAviana
EvelynAviana
EleanorAviana
GeorginaAviana
LucilleAviana
LuciaAviana
RoseAviana
DaisyAviana
CleoAviana
HarrietAviana
MatildaAviana
MillicentAviana
AmelieAviana
BethanAviana
LaylaAviana
AnyaAviana
Luna