How do you pronounce this name?

[DWFII]

Siobhan.

I think it would be pronounced pretty close to "chiffon."

[wvpiper]

This is the pronunciation I'm familiar with
shi-VAWN
http://www.behindthename.com/name/siobhan

[skauwt]

This is the pronunciation I'm familiar with
shi-VAWN
http://www.behindthename.com/name/siobhan

that's the pronunciation i hear round this neck of the woods

[DamnthePants]

Are you by any chance reading "The curious tale of the dog in the nighttime?" as Shiobhan is the main character in it.

[lethearen]

This is the pronunciation I'm familiar with
shi-VAWN
http://www.behindthename.com/name/siobhan

There's a fiery lass at my office with the name, and she pronounces it as wvpiper suggests.