NaNoWriMo names.

[The Jade Knight]

I have never heard nor read that name in my life

It's Gaelic.  Probably a fancy Irish female version of "Sean" (the Welsh version is "Siôn", I think.  Or "Siân".  I can never remember which is the male version, and which the female).

[Oldie Black Witch]

Pshaw. It's Gaeilge. Get it right, JK. Gadhlig is Scottish.
And I think the o is feminine and the a is masculine.

[Chimera]

How is it pronounced?

[stacer]

Really? I have never heard nor read that name in my life. What books?

I think it's mainly Gossip Girls, and there's one other, which has slipped my mind. Perhaps The Earth, My Butt, and Other Big, Round Things? I could be wrong.

[Oldie Black Witch]

Siobhan? It's pronounced shuh-vahn with the accent on the final syllable.
Where's my IPA characters when I need them?

[stacer]

Pronounced shi-von'. Oh, and it's Irish Gaelic, yes.

[The Jade Knight]

Pshaw. It's Gaeilge. Get it right, JK. Gadhlig is Scottish.  
And I think the o is feminine and the a is masculine.

If you're going to be elitist, you could at least get your spelling right.  It's Gaeilge and Gàidhlig, and Gaelg for Manx.

But I refer to them as Irish and Scots Gaelic.  I get annoyed when people refer to them as "Irish and Gaelic".  I doubt Siobhan is Gaelic (in form; it is obviously Gaelic in origin), however - there are no accents, and I would except to find one in there somewhere in Gaelic.

[Chimera]

See, I was putting a 'b' sound in there and thinking it sounded decidedly ugly. It sounds much better with a 'v' sound.  

[stacer]

'bh' in Gaelic is a V sound.

[The Jade Knight]

Gaelic spelling = oodles and oodles of fun.  Most complicated spelling system in the world, à mon avis.

[stacer]

Oh, and JK, just for you, my Irish roommate's name was Siobhan with a carrot accent over the I. I can't remember the name of the accent, and I can't remember how to do it in text, though.

It's actually a bad spelling, though, I think--most of the time I've seen it with an accent ague over the a in the second syllable.

[Oldie Black Witch]

All right. Siobhàn is the way I've most often seen it accented. But the accent mark could also go over the "o" or the "i".

Depending on where you learned your Irish, the accent marks may or may not be used. But the bh /v/ sound is very Celtic, as are the vowel combinations.

[Oldie Black Witch]

'bh' in Gaelic is a V sound.

Heh. So is mh, except when it's not.

[The Jade Knight]

Well, yes, naturally, but I don't consider Anglicized Gaelic names to be Gaelic.  And people shouldn't drop accents.  I'm very particular about this, even in English, where accent-dropping is nearly universal.

"naive" should be pronounced the same as "knave".  "naïve" should not.  "Fiancé" is much different than "fiance", and "mêlée" from "melee".

For example of an Anglicized Gaelic name, Shawn is decidedly unGaelic, despite that it is just a respelling of the more Gaelic "Sean".

The accent you were referring to, stacer, is called a circumflex.  (ALT + 0238 would give you it).

[stacer]

Yes, a circumflex. Thanks.

And Oldielocks, you're right, it is an accent grave.