Rae is right about how you pronounce "Cait" [Keet]
Caitriona is a Gaelic version of Catherine. In Irish is is pronounced like BDM suggests. But I am Scottish, so you put a surly Scottish accent on the first syllable and it becomes "Keet-ree-ona" or "Keet-ree-na" [kaitrina] It's all a matter of accent.
It actually is pronounced like BDM suggests by most people in my life, BUT my aunts in Scotland pronounce it the way it is intended.
To get the full effect you have to draw the first syllable out quite a bit, the way Scots are pone to do. So Cait really is Kate.. is just become Kaaeeeeeeeet, Caitriona becomes "Kaeeeet-ree-na" when a Scotsman says it. :bigass:
"Keet" for short, but most people just call me Kate. I answer to both.