What do you think of this name?

[Pandora]

I would have though Sharna.
And with a C Id say either Kee-anna or Chi-anna

Maybe something like Siahna?

[chickenlittle]

I would have pronounced it See-arna or Sharna... I think removing one N makes it more obvious for the pronunciation you want... ie Sianah or Siana x\

[CrystalBoo]

I'm with RayRay - you can't mispronounce Siahna. And it looks pretty too.

[Visitor3]

I would pronounce it See-Ah-Nah .... Sienna is pretty too

[Taurean]

I pronounced it how it's spelt so: Si-anna. I honestly think she'd be forever correcting people on the pronounciation and spelling. I think it could possibly be even mistaken for Sienna.

I like the pronounciation you're aiming for though. I might be strange but I'd prefer to see names spelt the way they're intended to be pronounced (so all confusion is avoided!) so if I wanted it to be 'see-arn-ah', then I'd spell it more like that. Siearna or Siarnah

[nickers]

i would pronounce it SIGH-ANNA
if it is meant to sound like SEE-ANNA Sienna i think it will get miss pronounced a fair bit